1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "bfd_stdint.h"
27 #include "libiberty.h"
31 #include "elf-vxworks.h"
34 /* Return the relocation section associated with NAME. HTAB is the
35 bfd's elf32_arm_link_hash_entry. */
36 #define RELOC_SECTION(HTAB, NAME) \
37 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
39 /* Return size of a relocation entry. HTAB is the bfd's
40 elf32_arm_link_hash_entry. */
41 #define RELOC_SIZE(HTAB) \
43 ? sizeof (Elf32_External_Rel) \
44 : sizeof (Elf32_External_Rela))
46 /* Return function to swap relocations in. HTAB is the bfd's
47 elf32_arm_link_hash_entry. */
48 #define SWAP_RELOC_IN(HTAB) \
50 ? bfd_elf32_swap_reloc_in \
51 : bfd_elf32_swap_reloca_in)
53 /* Return function to swap relocations out. HTAB is the bfd's
54 elf32_arm_link_hash_entry. */
55 #define SWAP_RELOC_OUT(HTAB) \
57 ? bfd_elf32_swap_reloc_out \
58 : bfd_elf32_swap_reloca_out)
60 #define elf_info_to_howto 0
61 #define elf_info_to_howto_rel elf32_arm_info_to_howto
63 #define ARM_ELF_ABI_VERSION 0
64 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
66 /* The Adjusted Place, as defined by AAELF. */
67 #define Pa(X) ((X) & 0xfffffffc)
69 static bfd_boolean
elf32_arm_write_section (bfd
*output_bfd
,
70 struct bfd_link_info
*link_info
,
74 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
75 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
78 static reloc_howto_type elf32_arm_howto_table_1
[] =
81 HOWTO (R_ARM_NONE
, /* type */
83 0, /* size (0 = byte, 1 = short, 2 = long) */
85 FALSE
, /* pc_relative */
87 complain_overflow_dont
,/* complain_on_overflow */
88 bfd_elf_generic_reloc
, /* special_function */
89 "R_ARM_NONE", /* name */
90 FALSE
, /* partial_inplace */
93 FALSE
), /* pcrel_offset */
95 HOWTO (R_ARM_PC24
, /* type */
97 2, /* size (0 = byte, 1 = short, 2 = long) */
99 TRUE
, /* pc_relative */
101 complain_overflow_signed
,/* complain_on_overflow */
102 bfd_elf_generic_reloc
, /* special_function */
103 "R_ARM_PC24", /* name */
104 FALSE
, /* partial_inplace */
105 0x00ffffff, /* src_mask */
106 0x00ffffff, /* dst_mask */
107 TRUE
), /* pcrel_offset */
109 /* 32 bit absolute */
110 HOWTO (R_ARM_ABS32
, /* type */
112 2, /* size (0 = byte, 1 = short, 2 = long) */
114 FALSE
, /* pc_relative */
116 complain_overflow_bitfield
,/* complain_on_overflow */
117 bfd_elf_generic_reloc
, /* special_function */
118 "R_ARM_ABS32", /* name */
119 FALSE
, /* partial_inplace */
120 0xffffffff, /* src_mask */
121 0xffffffff, /* dst_mask */
122 FALSE
), /* pcrel_offset */
124 /* standard 32bit pc-relative reloc */
125 HOWTO (R_ARM_REL32
, /* type */
127 2, /* size (0 = byte, 1 = short, 2 = long) */
129 TRUE
, /* pc_relative */
131 complain_overflow_bitfield
,/* complain_on_overflow */
132 bfd_elf_generic_reloc
, /* special_function */
133 "R_ARM_REL32", /* name */
134 FALSE
, /* partial_inplace */
135 0xffffffff, /* src_mask */
136 0xffffffff, /* dst_mask */
137 TRUE
), /* pcrel_offset */
139 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
140 HOWTO (R_ARM_LDR_PC_G0
, /* type */
142 0, /* size (0 = byte, 1 = short, 2 = long) */
144 TRUE
, /* pc_relative */
146 complain_overflow_dont
,/* complain_on_overflow */
147 bfd_elf_generic_reloc
, /* special_function */
148 "R_ARM_LDR_PC_G0", /* name */
149 FALSE
, /* partial_inplace */
150 0xffffffff, /* src_mask */
151 0xffffffff, /* dst_mask */
152 TRUE
), /* pcrel_offset */
154 /* 16 bit absolute */
155 HOWTO (R_ARM_ABS16
, /* type */
157 1, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE
, /* pc_relative */
161 complain_overflow_bitfield
,/* complain_on_overflow */
162 bfd_elf_generic_reloc
, /* special_function */
163 "R_ARM_ABS16", /* name */
164 FALSE
, /* partial_inplace */
165 0x0000ffff, /* src_mask */
166 0x0000ffff, /* dst_mask */
167 FALSE
), /* pcrel_offset */
169 /* 12 bit absolute */
170 HOWTO (R_ARM_ABS12
, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 FALSE
, /* pc_relative */
176 complain_overflow_bitfield
,/* complain_on_overflow */
177 bfd_elf_generic_reloc
, /* special_function */
178 "R_ARM_ABS12", /* name */
179 FALSE
, /* partial_inplace */
180 0x00000fff, /* src_mask */
181 0x00000fff, /* dst_mask */
182 FALSE
), /* pcrel_offset */
184 HOWTO (R_ARM_THM_ABS5
, /* type */
186 1, /* size (0 = byte, 1 = short, 2 = long) */
188 FALSE
, /* pc_relative */
190 complain_overflow_bitfield
,/* complain_on_overflow */
191 bfd_elf_generic_reloc
, /* special_function */
192 "R_ARM_THM_ABS5", /* name */
193 FALSE
, /* partial_inplace */
194 0x000007e0, /* src_mask */
195 0x000007e0, /* dst_mask */
196 FALSE
), /* pcrel_offset */
199 HOWTO (R_ARM_ABS8
, /* type */
201 0, /* size (0 = byte, 1 = short, 2 = long) */
203 FALSE
, /* pc_relative */
205 complain_overflow_bitfield
,/* complain_on_overflow */
206 bfd_elf_generic_reloc
, /* special_function */
207 "R_ARM_ABS8", /* name */
208 FALSE
, /* partial_inplace */
209 0x000000ff, /* src_mask */
210 0x000000ff, /* dst_mask */
211 FALSE
), /* pcrel_offset */
213 HOWTO (R_ARM_SBREL32
, /* type */
215 2, /* size (0 = byte, 1 = short, 2 = long) */
217 FALSE
, /* pc_relative */
219 complain_overflow_dont
,/* complain_on_overflow */
220 bfd_elf_generic_reloc
, /* special_function */
221 "R_ARM_SBREL32", /* name */
222 FALSE
, /* partial_inplace */
223 0xffffffff, /* src_mask */
224 0xffffffff, /* dst_mask */
225 FALSE
), /* pcrel_offset */
227 HOWTO (R_ARM_THM_CALL
, /* type */
229 2, /* size (0 = byte, 1 = short, 2 = long) */
231 TRUE
, /* pc_relative */
233 complain_overflow_signed
,/* complain_on_overflow */
234 bfd_elf_generic_reloc
, /* special_function */
235 "R_ARM_THM_CALL", /* name */
236 FALSE
, /* partial_inplace */
237 0x07ff2fff, /* src_mask */
238 0x07ff2fff, /* dst_mask */
239 TRUE
), /* pcrel_offset */
241 HOWTO (R_ARM_THM_PC8
, /* type */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
245 TRUE
, /* pc_relative */
247 complain_overflow_signed
,/* complain_on_overflow */
248 bfd_elf_generic_reloc
, /* special_function */
249 "R_ARM_THM_PC8", /* name */
250 FALSE
, /* partial_inplace */
251 0x000000ff, /* src_mask */
252 0x000000ff, /* dst_mask */
253 TRUE
), /* pcrel_offset */
255 HOWTO (R_ARM_BREL_ADJ
, /* type */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
259 FALSE
, /* pc_relative */
261 complain_overflow_signed
,/* complain_on_overflow */
262 bfd_elf_generic_reloc
, /* special_function */
263 "R_ARM_BREL_ADJ", /* name */
264 FALSE
, /* partial_inplace */
265 0xffffffff, /* src_mask */
266 0xffffffff, /* dst_mask */
267 FALSE
), /* pcrel_offset */
269 HOWTO (R_ARM_TLS_DESC
, /* type */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
273 FALSE
, /* pc_relative */
275 complain_overflow_bitfield
,/* complain_on_overflow */
276 bfd_elf_generic_reloc
, /* special_function */
277 "R_ARM_TLS_DESC", /* name */
278 FALSE
, /* partial_inplace */
279 0xffffffff, /* src_mask */
280 0xffffffff, /* dst_mask */
281 FALSE
), /* pcrel_offset */
283 HOWTO (R_ARM_THM_SWI8
, /* type */
285 0, /* size (0 = byte, 1 = short, 2 = long) */
287 FALSE
, /* pc_relative */
289 complain_overflow_signed
,/* complain_on_overflow */
290 bfd_elf_generic_reloc
, /* special_function */
291 "R_ARM_SWI8", /* name */
292 FALSE
, /* partial_inplace */
293 0x00000000, /* src_mask */
294 0x00000000, /* dst_mask */
295 FALSE
), /* pcrel_offset */
297 /* BLX instruction for the ARM. */
298 HOWTO (R_ARM_XPC25
, /* type */
300 2, /* size (0 = byte, 1 = short, 2 = long) */
302 TRUE
, /* pc_relative */
304 complain_overflow_signed
,/* complain_on_overflow */
305 bfd_elf_generic_reloc
, /* special_function */
306 "R_ARM_XPC25", /* name */
307 FALSE
, /* partial_inplace */
308 0x00ffffff, /* src_mask */
309 0x00ffffff, /* dst_mask */
310 TRUE
), /* pcrel_offset */
312 /* BLX instruction for the Thumb. */
313 HOWTO (R_ARM_THM_XPC22
, /* type */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
317 TRUE
, /* pc_relative */
319 complain_overflow_signed
,/* complain_on_overflow */
320 bfd_elf_generic_reloc
, /* special_function */
321 "R_ARM_THM_XPC22", /* name */
322 FALSE
, /* partial_inplace */
323 0x07ff2fff, /* src_mask */
324 0x07ff2fff, /* dst_mask */
325 TRUE
), /* pcrel_offset */
327 /* Dynamic TLS relocations. */
329 HOWTO (R_ARM_TLS_DTPMOD32
, /* type */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
333 FALSE
, /* pc_relative */
335 complain_overflow_bitfield
,/* complain_on_overflow */
336 bfd_elf_generic_reloc
, /* special_function */
337 "R_ARM_TLS_DTPMOD32", /* name */
338 TRUE
, /* partial_inplace */
339 0xffffffff, /* src_mask */
340 0xffffffff, /* dst_mask */
341 FALSE
), /* pcrel_offset */
343 HOWTO (R_ARM_TLS_DTPOFF32
, /* type */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
347 FALSE
, /* pc_relative */
349 complain_overflow_bitfield
,/* complain_on_overflow */
350 bfd_elf_generic_reloc
, /* special_function */
351 "R_ARM_TLS_DTPOFF32", /* name */
352 TRUE
, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
355 FALSE
), /* pcrel_offset */
357 HOWTO (R_ARM_TLS_TPOFF32
, /* type */
359 2, /* size (0 = byte, 1 = short, 2 = long) */
361 FALSE
, /* pc_relative */
363 complain_overflow_bitfield
,/* complain_on_overflow */
364 bfd_elf_generic_reloc
, /* special_function */
365 "R_ARM_TLS_TPOFF32", /* name */
366 TRUE
, /* partial_inplace */
367 0xffffffff, /* src_mask */
368 0xffffffff, /* dst_mask */
369 FALSE
), /* pcrel_offset */
371 /* Relocs used in ARM Linux */
373 HOWTO (R_ARM_COPY
, /* type */
375 2, /* size (0 = byte, 1 = short, 2 = long) */
377 FALSE
, /* pc_relative */
379 complain_overflow_bitfield
,/* complain_on_overflow */
380 bfd_elf_generic_reloc
, /* special_function */
381 "R_ARM_COPY", /* name */
382 TRUE
, /* partial_inplace */
383 0xffffffff, /* src_mask */
384 0xffffffff, /* dst_mask */
385 FALSE
), /* pcrel_offset */
387 HOWTO (R_ARM_GLOB_DAT
, /* type */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
391 FALSE
, /* pc_relative */
393 complain_overflow_bitfield
,/* complain_on_overflow */
394 bfd_elf_generic_reloc
, /* special_function */
395 "R_ARM_GLOB_DAT", /* name */
396 TRUE
, /* partial_inplace */
397 0xffffffff, /* src_mask */
398 0xffffffff, /* dst_mask */
399 FALSE
), /* pcrel_offset */
401 HOWTO (R_ARM_JUMP_SLOT
, /* type */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
405 FALSE
, /* pc_relative */
407 complain_overflow_bitfield
,/* complain_on_overflow */
408 bfd_elf_generic_reloc
, /* special_function */
409 "R_ARM_JUMP_SLOT", /* name */
410 TRUE
, /* partial_inplace */
411 0xffffffff, /* src_mask */
412 0xffffffff, /* dst_mask */
413 FALSE
), /* pcrel_offset */
415 HOWTO (R_ARM_RELATIVE
, /* type */
417 2, /* size (0 = byte, 1 = short, 2 = long) */
419 FALSE
, /* pc_relative */
421 complain_overflow_bitfield
,/* complain_on_overflow */
422 bfd_elf_generic_reloc
, /* special_function */
423 "R_ARM_RELATIVE", /* name */
424 TRUE
, /* partial_inplace */
425 0xffffffff, /* src_mask */
426 0xffffffff, /* dst_mask */
427 FALSE
), /* pcrel_offset */
429 HOWTO (R_ARM_GOTOFF32
, /* type */
431 2, /* size (0 = byte, 1 = short, 2 = long) */
433 FALSE
, /* pc_relative */
435 complain_overflow_bitfield
,/* complain_on_overflow */
436 bfd_elf_generic_reloc
, /* special_function */
437 "R_ARM_GOTOFF32", /* name */
438 TRUE
, /* partial_inplace */
439 0xffffffff, /* src_mask */
440 0xffffffff, /* dst_mask */
441 FALSE
), /* pcrel_offset */
443 HOWTO (R_ARM_GOTPC
, /* type */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
447 TRUE
, /* pc_relative */
449 complain_overflow_bitfield
,/* complain_on_overflow */
450 bfd_elf_generic_reloc
, /* special_function */
451 "R_ARM_GOTPC", /* name */
452 TRUE
, /* partial_inplace */
453 0xffffffff, /* src_mask */
454 0xffffffff, /* dst_mask */
455 TRUE
), /* pcrel_offset */
457 HOWTO (R_ARM_GOT32
, /* type */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
461 FALSE
, /* pc_relative */
463 complain_overflow_bitfield
,/* complain_on_overflow */
464 bfd_elf_generic_reloc
, /* special_function */
465 "R_ARM_GOT32", /* name */
466 TRUE
, /* partial_inplace */
467 0xffffffff, /* src_mask */
468 0xffffffff, /* dst_mask */
469 FALSE
), /* pcrel_offset */
471 HOWTO (R_ARM_PLT32
, /* type */
473 2, /* size (0 = byte, 1 = short, 2 = long) */
475 TRUE
, /* pc_relative */
477 complain_overflow_bitfield
,/* complain_on_overflow */
478 bfd_elf_generic_reloc
, /* special_function */
479 "R_ARM_PLT32", /* name */
480 FALSE
, /* partial_inplace */
481 0x00ffffff, /* src_mask */
482 0x00ffffff, /* dst_mask */
483 TRUE
), /* pcrel_offset */
485 HOWTO (R_ARM_CALL
, /* type */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
489 TRUE
, /* pc_relative */
491 complain_overflow_signed
,/* complain_on_overflow */
492 bfd_elf_generic_reloc
, /* special_function */
493 "R_ARM_CALL", /* name */
494 FALSE
, /* partial_inplace */
495 0x00ffffff, /* src_mask */
496 0x00ffffff, /* dst_mask */
497 TRUE
), /* pcrel_offset */
499 HOWTO (R_ARM_JUMP24
, /* type */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
503 TRUE
, /* pc_relative */
505 complain_overflow_signed
,/* complain_on_overflow */
506 bfd_elf_generic_reloc
, /* special_function */
507 "R_ARM_JUMP24", /* name */
508 FALSE
, /* partial_inplace */
509 0x00ffffff, /* src_mask */
510 0x00ffffff, /* dst_mask */
511 TRUE
), /* pcrel_offset */
513 HOWTO (R_ARM_THM_JUMP24
, /* type */
515 2, /* size (0 = byte, 1 = short, 2 = long) */
517 TRUE
, /* pc_relative */
519 complain_overflow_signed
,/* complain_on_overflow */
520 bfd_elf_generic_reloc
, /* special_function */
521 "R_ARM_THM_JUMP24", /* name */
522 FALSE
, /* partial_inplace */
523 0x07ff2fff, /* src_mask */
524 0x07ff2fff, /* dst_mask */
525 TRUE
), /* pcrel_offset */
527 HOWTO (R_ARM_BASE_ABS
, /* type */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
531 FALSE
, /* pc_relative */
533 complain_overflow_dont
,/* complain_on_overflow */
534 bfd_elf_generic_reloc
, /* special_function */
535 "R_ARM_BASE_ABS", /* name */
536 FALSE
, /* partial_inplace */
537 0xffffffff, /* src_mask */
538 0xffffffff, /* dst_mask */
539 FALSE
), /* pcrel_offset */
541 HOWTO (R_ARM_ALU_PCREL7_0
, /* type */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
545 TRUE
, /* pc_relative */
547 complain_overflow_dont
,/* complain_on_overflow */
548 bfd_elf_generic_reloc
, /* special_function */
549 "R_ARM_ALU_PCREL_7_0", /* name */
550 FALSE
, /* partial_inplace */
551 0x00000fff, /* src_mask */
552 0x00000fff, /* dst_mask */
553 TRUE
), /* pcrel_offset */
555 HOWTO (R_ARM_ALU_PCREL15_8
, /* type */
557 2, /* size (0 = byte, 1 = short, 2 = long) */
559 TRUE
, /* pc_relative */
561 complain_overflow_dont
,/* complain_on_overflow */
562 bfd_elf_generic_reloc
, /* special_function */
563 "R_ARM_ALU_PCREL_15_8",/* name */
564 FALSE
, /* partial_inplace */
565 0x00000fff, /* src_mask */
566 0x00000fff, /* dst_mask */
567 TRUE
), /* pcrel_offset */
569 HOWTO (R_ARM_ALU_PCREL23_15
, /* type */
571 2, /* size (0 = byte, 1 = short, 2 = long) */
573 TRUE
, /* pc_relative */
575 complain_overflow_dont
,/* complain_on_overflow */
576 bfd_elf_generic_reloc
, /* special_function */
577 "R_ARM_ALU_PCREL_23_15",/* name */
578 FALSE
, /* partial_inplace */
579 0x00000fff, /* src_mask */
580 0x00000fff, /* dst_mask */
581 TRUE
), /* pcrel_offset */
583 HOWTO (R_ARM_LDR_SBREL_11_0
, /* type */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
587 FALSE
, /* pc_relative */
589 complain_overflow_dont
,/* complain_on_overflow */
590 bfd_elf_generic_reloc
, /* special_function */
591 "R_ARM_LDR_SBREL_11_0",/* name */
592 FALSE
, /* partial_inplace */
593 0x00000fff, /* src_mask */
594 0x00000fff, /* dst_mask */
595 FALSE
), /* pcrel_offset */
597 HOWTO (R_ARM_ALU_SBREL_19_12
, /* type */
599 2, /* size (0 = byte, 1 = short, 2 = long) */
601 FALSE
, /* pc_relative */
603 complain_overflow_dont
,/* complain_on_overflow */
604 bfd_elf_generic_reloc
, /* special_function */
605 "R_ARM_ALU_SBREL_19_12",/* name */
606 FALSE
, /* partial_inplace */
607 0x000ff000, /* src_mask */
608 0x000ff000, /* dst_mask */
609 FALSE
), /* pcrel_offset */
611 HOWTO (R_ARM_ALU_SBREL_27_20
, /* type */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
615 FALSE
, /* pc_relative */
617 complain_overflow_dont
,/* complain_on_overflow */
618 bfd_elf_generic_reloc
, /* special_function */
619 "R_ARM_ALU_SBREL_27_20",/* name */
620 FALSE
, /* partial_inplace */
621 0x0ff00000, /* src_mask */
622 0x0ff00000, /* dst_mask */
623 FALSE
), /* pcrel_offset */
625 HOWTO (R_ARM_TARGET1
, /* type */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
629 FALSE
, /* pc_relative */
631 complain_overflow_dont
,/* complain_on_overflow */
632 bfd_elf_generic_reloc
, /* special_function */
633 "R_ARM_TARGET1", /* name */
634 FALSE
, /* partial_inplace */
635 0xffffffff, /* src_mask */
636 0xffffffff, /* dst_mask */
637 FALSE
), /* pcrel_offset */
639 HOWTO (R_ARM_ROSEGREL32
, /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 FALSE
, /* pc_relative */
645 complain_overflow_dont
,/* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 "R_ARM_ROSEGREL32", /* name */
648 FALSE
, /* partial_inplace */
649 0xffffffff, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE
), /* pcrel_offset */
653 HOWTO (R_ARM_V4BX
, /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 FALSE
, /* pc_relative */
659 complain_overflow_dont
,/* complain_on_overflow */
660 bfd_elf_generic_reloc
, /* special_function */
661 "R_ARM_V4BX", /* name */
662 FALSE
, /* partial_inplace */
663 0xffffffff, /* src_mask */
664 0xffffffff, /* dst_mask */
665 FALSE
), /* pcrel_offset */
667 HOWTO (R_ARM_TARGET2
, /* type */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
671 FALSE
, /* pc_relative */
673 complain_overflow_signed
,/* complain_on_overflow */
674 bfd_elf_generic_reloc
, /* special_function */
675 "R_ARM_TARGET2", /* name */
676 FALSE
, /* partial_inplace */
677 0xffffffff, /* src_mask */
678 0xffffffff, /* dst_mask */
679 TRUE
), /* pcrel_offset */
681 HOWTO (R_ARM_PREL31
, /* type */
683 2, /* size (0 = byte, 1 = short, 2 = long) */
685 TRUE
, /* pc_relative */
687 complain_overflow_signed
,/* complain_on_overflow */
688 bfd_elf_generic_reloc
, /* special_function */
689 "R_ARM_PREL31", /* name */
690 FALSE
, /* partial_inplace */
691 0x7fffffff, /* src_mask */
692 0x7fffffff, /* dst_mask */
693 TRUE
), /* pcrel_offset */
695 HOWTO (R_ARM_MOVW_ABS_NC
, /* type */
697 2, /* size (0 = byte, 1 = short, 2 = long) */
699 FALSE
, /* pc_relative */
701 complain_overflow_dont
,/* complain_on_overflow */
702 bfd_elf_generic_reloc
, /* special_function */
703 "R_ARM_MOVW_ABS_NC", /* name */
704 FALSE
, /* partial_inplace */
705 0x000f0fff, /* src_mask */
706 0x000f0fff, /* dst_mask */
707 FALSE
), /* pcrel_offset */
709 HOWTO (R_ARM_MOVT_ABS
, /* type */
711 2, /* size (0 = byte, 1 = short, 2 = long) */
713 FALSE
, /* pc_relative */
715 complain_overflow_bitfield
,/* complain_on_overflow */
716 bfd_elf_generic_reloc
, /* special_function */
717 "R_ARM_MOVT_ABS", /* name */
718 FALSE
, /* partial_inplace */
719 0x000f0fff, /* src_mask */
720 0x000f0fff, /* dst_mask */
721 FALSE
), /* pcrel_offset */
723 HOWTO (R_ARM_MOVW_PREL_NC
, /* type */
725 2, /* size (0 = byte, 1 = short, 2 = long) */
727 TRUE
, /* pc_relative */
729 complain_overflow_dont
,/* complain_on_overflow */
730 bfd_elf_generic_reloc
, /* special_function */
731 "R_ARM_MOVW_PREL_NC", /* name */
732 FALSE
, /* partial_inplace */
733 0x000f0fff, /* src_mask */
734 0x000f0fff, /* dst_mask */
735 TRUE
), /* pcrel_offset */
737 HOWTO (R_ARM_MOVT_PREL
, /* type */
739 2, /* size (0 = byte, 1 = short, 2 = long) */
741 TRUE
, /* pc_relative */
743 complain_overflow_bitfield
,/* complain_on_overflow */
744 bfd_elf_generic_reloc
, /* special_function */
745 "R_ARM_MOVT_PREL", /* name */
746 FALSE
, /* partial_inplace */
747 0x000f0fff, /* src_mask */
748 0x000f0fff, /* dst_mask */
749 TRUE
), /* pcrel_offset */
751 HOWTO (R_ARM_THM_MOVW_ABS_NC
, /* type */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
755 FALSE
, /* pc_relative */
757 complain_overflow_dont
,/* complain_on_overflow */
758 bfd_elf_generic_reloc
, /* special_function */
759 "R_ARM_THM_MOVW_ABS_NC",/* name */
760 FALSE
, /* partial_inplace */
761 0x040f70ff, /* src_mask */
762 0x040f70ff, /* dst_mask */
763 FALSE
), /* pcrel_offset */
765 HOWTO (R_ARM_THM_MOVT_ABS
, /* type */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
769 FALSE
, /* pc_relative */
771 complain_overflow_bitfield
,/* complain_on_overflow */
772 bfd_elf_generic_reloc
, /* special_function */
773 "R_ARM_THM_MOVT_ABS", /* name */
774 FALSE
, /* partial_inplace */
775 0x040f70ff, /* src_mask */
776 0x040f70ff, /* dst_mask */
777 FALSE
), /* pcrel_offset */
779 HOWTO (R_ARM_THM_MOVW_PREL_NC
,/* type */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
783 TRUE
, /* pc_relative */
785 complain_overflow_dont
,/* complain_on_overflow */
786 bfd_elf_generic_reloc
, /* special_function */
787 "R_ARM_THM_MOVW_PREL_NC",/* name */
788 FALSE
, /* partial_inplace */
789 0x040f70ff, /* src_mask */
790 0x040f70ff, /* dst_mask */
791 TRUE
), /* pcrel_offset */
793 HOWTO (R_ARM_THM_MOVT_PREL
, /* type */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
797 TRUE
, /* pc_relative */
799 complain_overflow_bitfield
,/* complain_on_overflow */
800 bfd_elf_generic_reloc
, /* special_function */
801 "R_ARM_THM_MOVT_PREL", /* name */
802 FALSE
, /* partial_inplace */
803 0x040f70ff, /* src_mask */
804 0x040f70ff, /* dst_mask */
805 TRUE
), /* pcrel_offset */
807 HOWTO (R_ARM_THM_JUMP19
, /* type */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
811 TRUE
, /* pc_relative */
813 complain_overflow_signed
,/* complain_on_overflow */
814 bfd_elf_generic_reloc
, /* special_function */
815 "R_ARM_THM_JUMP19", /* name */
816 FALSE
, /* partial_inplace */
817 0x043f2fff, /* src_mask */
818 0x043f2fff, /* dst_mask */
819 TRUE
), /* pcrel_offset */
821 HOWTO (R_ARM_THM_JUMP6
, /* type */
823 1, /* size (0 = byte, 1 = short, 2 = long) */
825 TRUE
, /* pc_relative */
827 complain_overflow_unsigned
,/* complain_on_overflow */
828 bfd_elf_generic_reloc
, /* special_function */
829 "R_ARM_THM_JUMP6", /* name */
830 FALSE
, /* partial_inplace */
831 0x02f8, /* src_mask */
832 0x02f8, /* dst_mask */
833 TRUE
), /* pcrel_offset */
835 /* These are declared as 13-bit signed relocations because we can
836 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
838 HOWTO (R_ARM_THM_ALU_PREL_11_0
,/* type */
840 2, /* size (0 = byte, 1 = short, 2 = long) */
842 TRUE
, /* pc_relative */
844 complain_overflow_dont
,/* complain_on_overflow */
845 bfd_elf_generic_reloc
, /* special_function */
846 "R_ARM_THM_ALU_PREL_11_0",/* name */
847 FALSE
, /* partial_inplace */
848 0xffffffff, /* src_mask */
849 0xffffffff, /* dst_mask */
850 TRUE
), /* pcrel_offset */
852 HOWTO (R_ARM_THM_PC12
, /* type */
854 2, /* size (0 = byte, 1 = short, 2 = long) */
856 TRUE
, /* pc_relative */
858 complain_overflow_dont
,/* complain_on_overflow */
859 bfd_elf_generic_reloc
, /* special_function */
860 "R_ARM_THM_PC12", /* name */
861 FALSE
, /* partial_inplace */
862 0xffffffff, /* src_mask */
863 0xffffffff, /* dst_mask */
864 TRUE
), /* pcrel_offset */
866 HOWTO (R_ARM_ABS32_NOI
, /* type */
868 2, /* size (0 = byte, 1 = short, 2 = long) */
870 FALSE
, /* pc_relative */
872 complain_overflow_dont
,/* complain_on_overflow */
873 bfd_elf_generic_reloc
, /* special_function */
874 "R_ARM_ABS32_NOI", /* name */
875 FALSE
, /* partial_inplace */
876 0xffffffff, /* src_mask */
877 0xffffffff, /* dst_mask */
878 FALSE
), /* pcrel_offset */
880 HOWTO (R_ARM_REL32_NOI
, /* type */
882 2, /* size (0 = byte, 1 = short, 2 = long) */
884 TRUE
, /* pc_relative */
886 complain_overflow_dont
,/* complain_on_overflow */
887 bfd_elf_generic_reloc
, /* special_function */
888 "R_ARM_REL32_NOI", /* name */
889 FALSE
, /* partial_inplace */
890 0xffffffff, /* src_mask */
891 0xffffffff, /* dst_mask */
892 FALSE
), /* pcrel_offset */
894 /* Group relocations. */
896 HOWTO (R_ARM_ALU_PC_G0_NC
, /* type */
898 2, /* size (0 = byte, 1 = short, 2 = long) */
900 TRUE
, /* pc_relative */
902 complain_overflow_dont
,/* complain_on_overflow */
903 bfd_elf_generic_reloc
, /* special_function */
904 "R_ARM_ALU_PC_G0_NC", /* name */
905 FALSE
, /* partial_inplace */
906 0xffffffff, /* src_mask */
907 0xffffffff, /* dst_mask */
908 TRUE
), /* pcrel_offset */
910 HOWTO (R_ARM_ALU_PC_G0
, /* type */
912 2, /* size (0 = byte, 1 = short, 2 = long) */
914 TRUE
, /* pc_relative */
916 complain_overflow_dont
,/* complain_on_overflow */
917 bfd_elf_generic_reloc
, /* special_function */
918 "R_ARM_ALU_PC_G0", /* name */
919 FALSE
, /* partial_inplace */
920 0xffffffff, /* src_mask */
921 0xffffffff, /* dst_mask */
922 TRUE
), /* pcrel_offset */
924 HOWTO (R_ARM_ALU_PC_G1_NC
, /* type */
926 2, /* size (0 = byte, 1 = short, 2 = long) */
928 TRUE
, /* pc_relative */
930 complain_overflow_dont
,/* complain_on_overflow */
931 bfd_elf_generic_reloc
, /* special_function */
932 "R_ARM_ALU_PC_G1_NC", /* name */
933 FALSE
, /* partial_inplace */
934 0xffffffff, /* src_mask */
935 0xffffffff, /* dst_mask */
936 TRUE
), /* pcrel_offset */
938 HOWTO (R_ARM_ALU_PC_G1
, /* type */
940 2, /* size (0 = byte, 1 = short, 2 = long) */
942 TRUE
, /* pc_relative */
944 complain_overflow_dont
,/* complain_on_overflow */
945 bfd_elf_generic_reloc
, /* special_function */
946 "R_ARM_ALU_PC_G1", /* name */
947 FALSE
, /* partial_inplace */
948 0xffffffff, /* src_mask */
949 0xffffffff, /* dst_mask */
950 TRUE
), /* pcrel_offset */
952 HOWTO (R_ARM_ALU_PC_G2
, /* type */
954 2, /* size (0 = byte, 1 = short, 2 = long) */
956 TRUE
, /* pc_relative */
958 complain_overflow_dont
,/* complain_on_overflow */
959 bfd_elf_generic_reloc
, /* special_function */
960 "R_ARM_ALU_PC_G2", /* name */
961 FALSE
, /* partial_inplace */
962 0xffffffff, /* src_mask */
963 0xffffffff, /* dst_mask */
964 TRUE
), /* pcrel_offset */
966 HOWTO (R_ARM_LDR_PC_G1
, /* type */
968 2, /* size (0 = byte, 1 = short, 2 = long) */
970 TRUE
, /* pc_relative */
972 complain_overflow_dont
,/* complain_on_overflow */
973 bfd_elf_generic_reloc
, /* special_function */
974 "R_ARM_LDR_PC_G1", /* name */
975 FALSE
, /* partial_inplace */
976 0xffffffff, /* src_mask */
977 0xffffffff, /* dst_mask */
978 TRUE
), /* pcrel_offset */
980 HOWTO (R_ARM_LDR_PC_G2
, /* type */
982 2, /* size (0 = byte, 1 = short, 2 = long) */
984 TRUE
, /* pc_relative */
986 complain_overflow_dont
,/* complain_on_overflow */
987 bfd_elf_generic_reloc
, /* special_function */
988 "R_ARM_LDR_PC_G2", /* name */
989 FALSE
, /* partial_inplace */
990 0xffffffff, /* src_mask */
991 0xffffffff, /* dst_mask */
992 TRUE
), /* pcrel_offset */
994 HOWTO (R_ARM_LDRS_PC_G0
, /* type */
996 2, /* size (0 = byte, 1 = short, 2 = long) */
998 TRUE
, /* pc_relative */
1000 complain_overflow_dont
,/* complain_on_overflow */
1001 bfd_elf_generic_reloc
, /* special_function */
1002 "R_ARM_LDRS_PC_G0", /* name */
1003 FALSE
, /* partial_inplace */
1004 0xffffffff, /* src_mask */
1005 0xffffffff, /* dst_mask */
1006 TRUE
), /* pcrel_offset */
1008 HOWTO (R_ARM_LDRS_PC_G1
, /* type */
1010 2, /* size (0 = byte, 1 = short, 2 = long) */
1012 TRUE
, /* pc_relative */
1014 complain_overflow_dont
,/* complain_on_overflow */
1015 bfd_elf_generic_reloc
, /* special_function */
1016 "R_ARM_LDRS_PC_G1", /* name */
1017 FALSE
, /* partial_inplace */
1018 0xffffffff, /* src_mask */
1019 0xffffffff, /* dst_mask */
1020 TRUE
), /* pcrel_offset */
1022 HOWTO (R_ARM_LDRS_PC_G2
, /* type */
1024 2, /* size (0 = byte, 1 = short, 2 = long) */
1026 TRUE
, /* pc_relative */
1028 complain_overflow_dont
,/* complain_on_overflow */
1029 bfd_elf_generic_reloc
, /* special_function */
1030 "R_ARM_LDRS_PC_G2", /* name */
1031 FALSE
, /* partial_inplace */
1032 0xffffffff, /* src_mask */
1033 0xffffffff, /* dst_mask */
1034 TRUE
), /* pcrel_offset */
1036 HOWTO (R_ARM_LDC_PC_G0
, /* type */
1038 2, /* size (0 = byte, 1 = short, 2 = long) */
1040 TRUE
, /* pc_relative */
1042 complain_overflow_dont
,/* complain_on_overflow */
1043 bfd_elf_generic_reloc
, /* special_function */
1044 "R_ARM_LDC_PC_G0", /* name */
1045 FALSE
, /* partial_inplace */
1046 0xffffffff, /* src_mask */
1047 0xffffffff, /* dst_mask */
1048 TRUE
), /* pcrel_offset */
1050 HOWTO (R_ARM_LDC_PC_G1
, /* type */
1052 2, /* size (0 = byte, 1 = short, 2 = long) */
1054 TRUE
, /* pc_relative */
1056 complain_overflow_dont
,/* complain_on_overflow */
1057 bfd_elf_generic_reloc
, /* special_function */
1058 "R_ARM_LDC_PC_G1", /* name */
1059 FALSE
, /* partial_inplace */
1060 0xffffffff, /* src_mask */
1061 0xffffffff, /* dst_mask */
1062 TRUE
), /* pcrel_offset */
1064 HOWTO (R_ARM_LDC_PC_G2
, /* type */
1066 2, /* size (0 = byte, 1 = short, 2 = long) */
1068 TRUE
, /* pc_relative */
1070 complain_overflow_dont
,/* complain_on_overflow */
1071 bfd_elf_generic_reloc
, /* special_function */
1072 "R_ARM_LDC_PC_G2", /* name */
1073 FALSE
, /* partial_inplace */
1074 0xffffffff, /* src_mask */
1075 0xffffffff, /* dst_mask */
1076 TRUE
), /* pcrel_offset */
1078 HOWTO (R_ARM_ALU_SB_G0_NC
, /* type */
1080 2, /* size (0 = byte, 1 = short, 2 = long) */
1082 TRUE
, /* pc_relative */
1084 complain_overflow_dont
,/* complain_on_overflow */
1085 bfd_elf_generic_reloc
, /* special_function */
1086 "R_ARM_ALU_SB_G0_NC", /* name */
1087 FALSE
, /* partial_inplace */
1088 0xffffffff, /* src_mask */
1089 0xffffffff, /* dst_mask */
1090 TRUE
), /* pcrel_offset */
1092 HOWTO (R_ARM_ALU_SB_G0
, /* type */
1094 2, /* size (0 = byte, 1 = short, 2 = long) */
1096 TRUE
, /* pc_relative */
1098 complain_overflow_dont
,/* complain_on_overflow */
1099 bfd_elf_generic_reloc
, /* special_function */
1100 "R_ARM_ALU_SB_G0", /* name */
1101 FALSE
, /* partial_inplace */
1102 0xffffffff, /* src_mask */
1103 0xffffffff, /* dst_mask */
1104 TRUE
), /* pcrel_offset */
1106 HOWTO (R_ARM_ALU_SB_G1_NC
, /* type */
1108 2, /* size (0 = byte, 1 = short, 2 = long) */
1110 TRUE
, /* pc_relative */
1112 complain_overflow_dont
,/* complain_on_overflow */
1113 bfd_elf_generic_reloc
, /* special_function */
1114 "R_ARM_ALU_SB_G1_NC", /* name */
1115 FALSE
, /* partial_inplace */
1116 0xffffffff, /* src_mask */
1117 0xffffffff, /* dst_mask */
1118 TRUE
), /* pcrel_offset */
1120 HOWTO (R_ARM_ALU_SB_G1
, /* type */
1122 2, /* size (0 = byte, 1 = short, 2 = long) */
1124 TRUE
, /* pc_relative */
1126 complain_overflow_dont
,/* complain_on_overflow */
1127 bfd_elf_generic_reloc
, /* special_function */
1128 "R_ARM_ALU_SB_G1", /* name */
1129 FALSE
, /* partial_inplace */
1130 0xffffffff, /* src_mask */
1131 0xffffffff, /* dst_mask */
1132 TRUE
), /* pcrel_offset */
1134 HOWTO (R_ARM_ALU_SB_G2
, /* type */
1136 2, /* size (0 = byte, 1 = short, 2 = long) */
1138 TRUE
, /* pc_relative */
1140 complain_overflow_dont
,/* complain_on_overflow */
1141 bfd_elf_generic_reloc
, /* special_function */
1142 "R_ARM_ALU_SB_G2", /* name */
1143 FALSE
, /* partial_inplace */
1144 0xffffffff, /* src_mask */
1145 0xffffffff, /* dst_mask */
1146 TRUE
), /* pcrel_offset */
1148 HOWTO (R_ARM_LDR_SB_G0
, /* type */
1150 2, /* size (0 = byte, 1 = short, 2 = long) */
1152 TRUE
, /* pc_relative */
1154 complain_overflow_dont
,/* complain_on_overflow */
1155 bfd_elf_generic_reloc
, /* special_function */
1156 "R_ARM_LDR_SB_G0", /* name */
1157 FALSE
, /* partial_inplace */
1158 0xffffffff, /* src_mask */
1159 0xffffffff, /* dst_mask */
1160 TRUE
), /* pcrel_offset */
1162 HOWTO (R_ARM_LDR_SB_G1
, /* type */
1164 2, /* size (0 = byte, 1 = short, 2 = long) */
1166 TRUE
, /* pc_relative */
1168 complain_overflow_dont
,/* complain_on_overflow */
1169 bfd_elf_generic_reloc
, /* special_function */
1170 "R_ARM_LDR_SB_G1", /* name */
1171 FALSE
, /* partial_inplace */
1172 0xffffffff, /* src_mask */
1173 0xffffffff, /* dst_mask */
1174 TRUE
), /* pcrel_offset */
1176 HOWTO (R_ARM_LDR_SB_G2
, /* type */
1178 2, /* size (0 = byte, 1 = short, 2 = long) */
1180 TRUE
, /* pc_relative */
1182 complain_overflow_dont
,/* complain_on_overflow */
1183 bfd_elf_generic_reloc
, /* special_function */
1184 "R_ARM_LDR_SB_G2", /* name */
1185 FALSE
, /* partial_inplace */
1186 0xffffffff, /* src_mask */
1187 0xffffffff, /* dst_mask */
1188 TRUE
), /* pcrel_offset */
1190 HOWTO (R_ARM_LDRS_SB_G0
, /* type */
1192 2, /* size (0 = byte, 1 = short, 2 = long) */
1194 TRUE
, /* pc_relative */
1196 complain_overflow_dont
,/* complain_on_overflow */
1197 bfd_elf_generic_reloc
, /* special_function */
1198 "R_ARM_LDRS_SB_G0", /* name */
1199 FALSE
, /* partial_inplace */
1200 0xffffffff, /* src_mask */
1201 0xffffffff, /* dst_mask */
1202 TRUE
), /* pcrel_offset */
1204 HOWTO (R_ARM_LDRS_SB_G1
, /* type */
1206 2, /* size (0 = byte, 1 = short, 2 = long) */
1208 TRUE
, /* pc_relative */
1210 complain_overflow_dont
,/* complain_on_overflow */
1211 bfd_elf_generic_reloc
, /* special_function */
1212 "R_ARM_LDRS_SB_G1", /* name */
1213 FALSE
, /* partial_inplace */
1214 0xffffffff, /* src_mask */
1215 0xffffffff, /* dst_mask */
1216 TRUE
), /* pcrel_offset */
1218 HOWTO (R_ARM_LDRS_SB_G2
, /* type */
1220 2, /* size (0 = byte, 1 = short, 2 = long) */
1222 TRUE
, /* pc_relative */
1224 complain_overflow_dont
,/* complain_on_overflow */
1225 bfd_elf_generic_reloc
, /* special_function */
1226 "R_ARM_LDRS_SB_G2", /* name */
1227 FALSE
, /* partial_inplace */
1228 0xffffffff, /* src_mask */
1229 0xffffffff, /* dst_mask */
1230 TRUE
), /* pcrel_offset */
1232 HOWTO (R_ARM_LDC_SB_G0
, /* type */
1234 2, /* size (0 = byte, 1 = short, 2 = long) */
1236 TRUE
, /* pc_relative */
1238 complain_overflow_dont
,/* complain_on_overflow */
1239 bfd_elf_generic_reloc
, /* special_function */
1240 "R_ARM_LDC_SB_G0", /* name */
1241 FALSE
, /* partial_inplace */
1242 0xffffffff, /* src_mask */
1243 0xffffffff, /* dst_mask */
1244 TRUE
), /* pcrel_offset */
1246 HOWTO (R_ARM_LDC_SB_G1
, /* type */
1248 2, /* size (0 = byte, 1 = short, 2 = long) */
1250 TRUE
, /* pc_relative */
1252 complain_overflow_dont
,/* complain_on_overflow */
1253 bfd_elf_generic_reloc
, /* special_function */
1254 "R_ARM_LDC_SB_G1", /* name */
1255 FALSE
, /* partial_inplace */
1256 0xffffffff, /* src_mask */
1257 0xffffffff, /* dst_mask */
1258 TRUE
), /* pcrel_offset */
1260 HOWTO (R_ARM_LDC_SB_G2
, /* type */
1262 2, /* size (0 = byte, 1 = short, 2 = long) */
1264 TRUE
, /* pc_relative */
1266 complain_overflow_dont
,/* complain_on_overflow */
1267 bfd_elf_generic_reloc
, /* special_function */
1268 "R_ARM_LDC_SB_G2", /* name */
1269 FALSE
, /* partial_inplace */
1270 0xffffffff, /* src_mask */
1271 0xffffffff, /* dst_mask */
1272 TRUE
), /* pcrel_offset */
1274 /* End of group relocations. */
1276 HOWTO (R_ARM_MOVW_BREL_NC
, /* type */
1278 2, /* size (0 = byte, 1 = short, 2 = long) */
1280 FALSE
, /* pc_relative */
1282 complain_overflow_dont
,/* complain_on_overflow */
1283 bfd_elf_generic_reloc
, /* special_function */
1284 "R_ARM_MOVW_BREL_NC", /* name */
1285 FALSE
, /* partial_inplace */
1286 0x0000ffff, /* src_mask */
1287 0x0000ffff, /* dst_mask */
1288 FALSE
), /* pcrel_offset */
1290 HOWTO (R_ARM_MOVT_BREL
, /* type */
1292 2, /* size (0 = byte, 1 = short, 2 = long) */
1294 FALSE
, /* pc_relative */
1296 complain_overflow_bitfield
,/* complain_on_overflow */
1297 bfd_elf_generic_reloc
, /* special_function */
1298 "R_ARM_MOVT_BREL", /* name */
1299 FALSE
, /* partial_inplace */
1300 0x0000ffff, /* src_mask */
1301 0x0000ffff, /* dst_mask */
1302 FALSE
), /* pcrel_offset */
1304 HOWTO (R_ARM_MOVW_BREL
, /* type */
1306 2, /* size (0 = byte, 1 = short, 2 = long) */
1308 FALSE
, /* pc_relative */
1310 complain_overflow_dont
,/* complain_on_overflow */
1311 bfd_elf_generic_reloc
, /* special_function */
1312 "R_ARM_MOVW_BREL", /* name */
1313 FALSE
, /* partial_inplace */
1314 0x0000ffff, /* src_mask */
1315 0x0000ffff, /* dst_mask */
1316 FALSE
), /* pcrel_offset */
1318 HOWTO (R_ARM_THM_MOVW_BREL_NC
,/* type */
1320 2, /* size (0 = byte, 1 = short, 2 = long) */
1322 FALSE
, /* pc_relative */
1324 complain_overflow_dont
,/* complain_on_overflow */
1325 bfd_elf_generic_reloc
, /* special_function */
1326 "R_ARM_THM_MOVW_BREL_NC",/* name */
1327 FALSE
, /* partial_inplace */
1328 0x040f70ff, /* src_mask */
1329 0x040f70ff, /* dst_mask */
1330 FALSE
), /* pcrel_offset */
1332 HOWTO (R_ARM_THM_MOVT_BREL
, /* type */
1334 2, /* size (0 = byte, 1 = short, 2 = long) */
1336 FALSE
, /* pc_relative */
1338 complain_overflow_bitfield
,/* complain_on_overflow */
1339 bfd_elf_generic_reloc
, /* special_function */
1340 "R_ARM_THM_MOVT_BREL", /* name */
1341 FALSE
, /* partial_inplace */
1342 0x040f70ff, /* src_mask */
1343 0x040f70ff, /* dst_mask */
1344 FALSE
), /* pcrel_offset */
1346 HOWTO (R_ARM_THM_MOVW_BREL
, /* type */
1348 2, /* size (0 = byte, 1 = short, 2 = long) */
1350 FALSE
, /* pc_relative */
1352 complain_overflow_dont
,/* complain_on_overflow */
1353 bfd_elf_generic_reloc
, /* special_function */
1354 "R_ARM_THM_MOVW_BREL", /* name */
1355 FALSE
, /* partial_inplace */
1356 0x040f70ff, /* src_mask */
1357 0x040f70ff, /* dst_mask */
1358 FALSE
), /* pcrel_offset */
1360 HOWTO (R_ARM_TLS_GOTDESC
, /* type */
1362 2, /* size (0 = byte, 1 = short, 2 = long) */
1364 FALSE
, /* pc_relative */
1366 complain_overflow_bitfield
,/* complain_on_overflow */
1367 NULL
, /* special_function */
1368 "R_ARM_TLS_GOTDESC", /* name */
1369 TRUE
, /* partial_inplace */
1370 0xffffffff, /* src_mask */
1371 0xffffffff, /* dst_mask */
1372 FALSE
), /* pcrel_offset */
1374 HOWTO (R_ARM_TLS_CALL
, /* type */
1376 2, /* size (0 = byte, 1 = short, 2 = long) */
1378 FALSE
, /* pc_relative */
1380 complain_overflow_dont
,/* complain_on_overflow */
1381 bfd_elf_generic_reloc
, /* special_function */
1382 "R_ARM_TLS_CALL", /* name */
1383 FALSE
, /* partial_inplace */
1384 0x00ffffff, /* src_mask */
1385 0x00ffffff, /* dst_mask */
1386 FALSE
), /* pcrel_offset */
1388 HOWTO (R_ARM_TLS_DESCSEQ
, /* type */
1390 2, /* size (0 = byte, 1 = short, 2 = long) */
1392 FALSE
, /* pc_relative */
1394 complain_overflow_bitfield
,/* complain_on_overflow */
1395 bfd_elf_generic_reloc
, /* special_function */
1396 "R_ARM_TLS_DESCSEQ", /* name */
1397 FALSE
, /* partial_inplace */
1398 0x00000000, /* src_mask */
1399 0x00000000, /* dst_mask */
1400 FALSE
), /* pcrel_offset */
1402 HOWTO (R_ARM_THM_TLS_CALL
, /* type */
1404 2, /* size (0 = byte, 1 = short, 2 = long) */
1406 FALSE
, /* pc_relative */
1408 complain_overflow_dont
,/* complain_on_overflow */
1409 bfd_elf_generic_reloc
, /* special_function */
1410 "R_ARM_THM_TLS_CALL", /* name */
1411 FALSE
, /* partial_inplace */
1412 0x07ff07ff, /* src_mask */
1413 0x07ff07ff, /* dst_mask */
1414 FALSE
), /* pcrel_offset */
1416 HOWTO (R_ARM_PLT32_ABS
, /* type */
1418 2, /* size (0 = byte, 1 = short, 2 = long) */
1420 FALSE
, /* pc_relative */
1422 complain_overflow_dont
,/* complain_on_overflow */
1423 bfd_elf_generic_reloc
, /* special_function */
1424 "R_ARM_PLT32_ABS", /* name */
1425 FALSE
, /* partial_inplace */
1426 0xffffffff, /* src_mask */
1427 0xffffffff, /* dst_mask */
1428 FALSE
), /* pcrel_offset */
1430 HOWTO (R_ARM_GOT_ABS
, /* type */
1432 2, /* size (0 = byte, 1 = short, 2 = long) */
1434 FALSE
, /* pc_relative */
1436 complain_overflow_dont
,/* complain_on_overflow */
1437 bfd_elf_generic_reloc
, /* special_function */
1438 "R_ARM_GOT_ABS", /* name */
1439 FALSE
, /* partial_inplace */
1440 0xffffffff, /* src_mask */
1441 0xffffffff, /* dst_mask */
1442 FALSE
), /* pcrel_offset */
1444 HOWTO (R_ARM_GOT_PREL
, /* type */
1446 2, /* size (0 = byte, 1 = short, 2 = long) */
1448 TRUE
, /* pc_relative */
1450 complain_overflow_dont
, /* complain_on_overflow */
1451 bfd_elf_generic_reloc
, /* special_function */
1452 "R_ARM_GOT_PREL", /* name */
1453 FALSE
, /* partial_inplace */
1454 0xffffffff, /* src_mask */
1455 0xffffffff, /* dst_mask */
1456 TRUE
), /* pcrel_offset */
1458 HOWTO (R_ARM_GOT_BREL12
, /* type */
1460 2, /* size (0 = byte, 1 = short, 2 = long) */
1462 FALSE
, /* pc_relative */
1464 complain_overflow_bitfield
,/* complain_on_overflow */
1465 bfd_elf_generic_reloc
, /* special_function */
1466 "R_ARM_GOT_BREL12", /* name */
1467 FALSE
, /* partial_inplace */
1468 0x00000fff, /* src_mask */
1469 0x00000fff, /* dst_mask */
1470 FALSE
), /* pcrel_offset */
1472 HOWTO (R_ARM_GOTOFF12
, /* type */
1474 2, /* size (0 = byte, 1 = short, 2 = long) */
1476 FALSE
, /* pc_relative */
1478 complain_overflow_bitfield
,/* complain_on_overflow */
1479 bfd_elf_generic_reloc
, /* special_function */
1480 "R_ARM_GOTOFF12", /* name */
1481 FALSE
, /* partial_inplace */
1482 0x00000fff, /* src_mask */
1483 0x00000fff, /* dst_mask */
1484 FALSE
), /* pcrel_offset */
1486 EMPTY_HOWTO (R_ARM_GOTRELAX
), /* reserved for future GOT-load optimizations */
1488 /* GNU extension to record C++ vtable member usage */
1489 HOWTO (R_ARM_GNU_VTENTRY
, /* type */
1491 2, /* size (0 = byte, 1 = short, 2 = long) */
1493 FALSE
, /* pc_relative */
1495 complain_overflow_dont
, /* complain_on_overflow */
1496 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
1497 "R_ARM_GNU_VTENTRY", /* name */
1498 FALSE
, /* partial_inplace */
1501 FALSE
), /* pcrel_offset */
1503 /* GNU extension to record C++ vtable hierarchy */
1504 HOWTO (R_ARM_GNU_VTINHERIT
, /* type */
1506 2, /* size (0 = byte, 1 = short, 2 = long) */
1508 FALSE
, /* pc_relative */
1510 complain_overflow_dont
, /* complain_on_overflow */
1511 NULL
, /* special_function */
1512 "R_ARM_GNU_VTINHERIT", /* name */
1513 FALSE
, /* partial_inplace */
1516 FALSE
), /* pcrel_offset */
1518 HOWTO (R_ARM_THM_JUMP11
, /* type */
1520 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 TRUE
, /* pc_relative */
1524 complain_overflow_signed
, /* complain_on_overflow */
1525 bfd_elf_generic_reloc
, /* special_function */
1526 "R_ARM_THM_JUMP11", /* name */
1527 FALSE
, /* partial_inplace */
1528 0x000007ff, /* src_mask */
1529 0x000007ff, /* dst_mask */
1530 TRUE
), /* pcrel_offset */
1532 HOWTO (R_ARM_THM_JUMP8
, /* type */
1534 1, /* size (0 = byte, 1 = short, 2 = long) */
1536 TRUE
, /* pc_relative */
1538 complain_overflow_signed
, /* complain_on_overflow */
1539 bfd_elf_generic_reloc
, /* special_function */
1540 "R_ARM_THM_JUMP8", /* name */
1541 FALSE
, /* partial_inplace */
1542 0x000000ff, /* src_mask */
1543 0x000000ff, /* dst_mask */
1544 TRUE
), /* pcrel_offset */
1546 /* TLS relocations */
1547 HOWTO (R_ARM_TLS_GD32
, /* type */
1549 2, /* size (0 = byte, 1 = short, 2 = long) */
1551 FALSE
, /* pc_relative */
1553 complain_overflow_bitfield
,/* complain_on_overflow */
1554 NULL
, /* special_function */
1555 "R_ARM_TLS_GD32", /* name */
1556 TRUE
, /* partial_inplace */
1557 0xffffffff, /* src_mask */
1558 0xffffffff, /* dst_mask */
1559 FALSE
), /* pcrel_offset */
1561 HOWTO (R_ARM_TLS_LDM32
, /* type */
1563 2, /* size (0 = byte, 1 = short, 2 = long) */
1565 FALSE
, /* pc_relative */
1567 complain_overflow_bitfield
,/* complain_on_overflow */
1568 bfd_elf_generic_reloc
, /* special_function */
1569 "R_ARM_TLS_LDM32", /* name */
1570 TRUE
, /* partial_inplace */
1571 0xffffffff, /* src_mask */
1572 0xffffffff, /* dst_mask */
1573 FALSE
), /* pcrel_offset */
1575 HOWTO (R_ARM_TLS_LDO32
, /* type */
1577 2, /* size (0 = byte, 1 = short, 2 = long) */
1579 FALSE
, /* pc_relative */
1581 complain_overflow_bitfield
,/* complain_on_overflow */
1582 bfd_elf_generic_reloc
, /* special_function */
1583 "R_ARM_TLS_LDO32", /* name */
1584 TRUE
, /* partial_inplace */
1585 0xffffffff, /* src_mask */
1586 0xffffffff, /* dst_mask */
1587 FALSE
), /* pcrel_offset */
1589 HOWTO (R_ARM_TLS_IE32
, /* type */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1593 FALSE
, /* pc_relative */
1595 complain_overflow_bitfield
,/* complain_on_overflow */
1596 NULL
, /* special_function */
1597 "R_ARM_TLS_IE32", /* name */
1598 TRUE
, /* partial_inplace */
1599 0xffffffff, /* src_mask */
1600 0xffffffff, /* dst_mask */
1601 FALSE
), /* pcrel_offset */
1603 HOWTO (R_ARM_TLS_LE32
, /* type */
1605 2, /* size (0 = byte, 1 = short, 2 = long) */
1607 FALSE
, /* pc_relative */
1609 complain_overflow_bitfield
,/* complain_on_overflow */
1610 bfd_elf_generic_reloc
, /* special_function */
1611 "R_ARM_TLS_LE32", /* name */
1612 TRUE
, /* partial_inplace */
1613 0xffffffff, /* src_mask */
1614 0xffffffff, /* dst_mask */
1615 FALSE
), /* pcrel_offset */
1617 HOWTO (R_ARM_TLS_LDO12
, /* type */
1619 2, /* size (0 = byte, 1 = short, 2 = long) */
1621 FALSE
, /* pc_relative */
1623 complain_overflow_bitfield
,/* complain_on_overflow */
1624 bfd_elf_generic_reloc
, /* special_function */
1625 "R_ARM_TLS_LDO12", /* name */
1626 FALSE
, /* partial_inplace */
1627 0x00000fff, /* src_mask */
1628 0x00000fff, /* dst_mask */
1629 FALSE
), /* pcrel_offset */
1631 HOWTO (R_ARM_TLS_LE12
, /* type */
1633 2, /* size (0 = byte, 1 = short, 2 = long) */
1635 FALSE
, /* pc_relative */
1637 complain_overflow_bitfield
,/* complain_on_overflow */
1638 bfd_elf_generic_reloc
, /* special_function */
1639 "R_ARM_TLS_LE12", /* name */
1640 FALSE
, /* partial_inplace */
1641 0x00000fff, /* src_mask */
1642 0x00000fff, /* dst_mask */
1643 FALSE
), /* pcrel_offset */
1645 HOWTO (R_ARM_TLS_IE12GP
, /* type */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1649 FALSE
, /* pc_relative */
1651 complain_overflow_bitfield
,/* complain_on_overflow */
1652 bfd_elf_generic_reloc
, /* special_function */
1653 "R_ARM_TLS_IE12GP", /* name */
1654 FALSE
, /* partial_inplace */
1655 0x00000fff, /* src_mask */
1656 0x00000fff, /* dst_mask */
1657 FALSE
), /* pcrel_offset */
1659 /* 112-127 private relocations. */
1677 /* R_ARM_ME_TOO, obsolete. */
1680 HOWTO (R_ARM_THM_TLS_DESCSEQ
, /* type */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 FALSE
, /* pc_relative */
1686 complain_overflow_bitfield
,/* complain_on_overflow */
1687 bfd_elf_generic_reloc
, /* special_function */
1688 "R_ARM_THM_TLS_DESCSEQ",/* name */
1689 FALSE
, /* partial_inplace */
1690 0x00000000, /* src_mask */
1691 0x00000000, /* dst_mask */
1692 FALSE
), /* pcrel_offset */
1696 static reloc_howto_type elf32_arm_howto_table_2
[1] =
1698 HOWTO (R_ARM_IRELATIVE
, /* type */
1700 2, /* size (0 = byte, 1 = short, 2 = long) */
1702 FALSE
, /* pc_relative */
1704 complain_overflow_bitfield
,/* complain_on_overflow */
1705 bfd_elf_generic_reloc
, /* special_function */
1706 "R_ARM_IRELATIVE", /* name */
1707 TRUE
, /* partial_inplace */
1708 0xffffffff, /* src_mask */
1709 0xffffffff, /* dst_mask */
1710 FALSE
) /* pcrel_offset */
1713 /* 249-255 extended, currently unused, relocations: */
1714 static reloc_howto_type elf32_arm_howto_table_3
[4] =
1716 HOWTO (R_ARM_RREL32
, /* type */
1718 0, /* size (0 = byte, 1 = short, 2 = long) */
1720 FALSE
, /* pc_relative */
1722 complain_overflow_dont
,/* complain_on_overflow */
1723 bfd_elf_generic_reloc
, /* special_function */
1724 "R_ARM_RREL32", /* name */
1725 FALSE
, /* partial_inplace */
1728 FALSE
), /* pcrel_offset */
1730 HOWTO (R_ARM_RABS32
, /* type */
1732 0, /* size (0 = byte, 1 = short, 2 = long) */
1734 FALSE
, /* pc_relative */
1736 complain_overflow_dont
,/* complain_on_overflow */
1737 bfd_elf_generic_reloc
, /* special_function */
1738 "R_ARM_RABS32", /* name */
1739 FALSE
, /* partial_inplace */
1742 FALSE
), /* pcrel_offset */
1744 HOWTO (R_ARM_RPC24
, /* type */
1746 0, /* size (0 = byte, 1 = short, 2 = long) */
1748 FALSE
, /* pc_relative */
1750 complain_overflow_dont
,/* complain_on_overflow */
1751 bfd_elf_generic_reloc
, /* special_function */
1752 "R_ARM_RPC24", /* name */
1753 FALSE
, /* partial_inplace */
1756 FALSE
), /* pcrel_offset */
1758 HOWTO (R_ARM_RBASE
, /* type */
1760 0, /* size (0 = byte, 1 = short, 2 = long) */
1762 FALSE
, /* pc_relative */
1764 complain_overflow_dont
,/* complain_on_overflow */
1765 bfd_elf_generic_reloc
, /* special_function */
1766 "R_ARM_RBASE", /* name */
1767 FALSE
, /* partial_inplace */
1770 FALSE
) /* pcrel_offset */
1773 static reloc_howto_type
*
1774 elf32_arm_howto_from_type (unsigned int r_type
)
1776 if (r_type
< ARRAY_SIZE (elf32_arm_howto_table_1
))
1777 return &elf32_arm_howto_table_1
[r_type
];
1779 if (r_type
== R_ARM_IRELATIVE
)
1780 return &elf32_arm_howto_table_2
[r_type
- R_ARM_IRELATIVE
];
1782 if (r_type
>= R_ARM_RREL32
1783 && r_type
< R_ARM_RREL32
+ ARRAY_SIZE (elf32_arm_howto_table_3
))
1784 return &elf32_arm_howto_table_3
[r_type
- R_ARM_RREL32
];
1790 elf32_arm_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
, arelent
* bfd_reloc
,
1791 Elf_Internal_Rela
* elf_reloc
)
1793 unsigned int r_type
;
1795 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
1796 bfd_reloc
->howto
= elf32_arm_howto_from_type (r_type
);
1799 struct elf32_arm_reloc_map
1801 bfd_reloc_code_real_type bfd_reloc_val
;
1802 unsigned char elf_reloc_val
;
1805 /* All entries in this list must also be present in elf32_arm_howto_table. */
1806 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
1808 {BFD_RELOC_NONE
, R_ARM_NONE
},
1809 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
},
1810 {BFD_RELOC_ARM_PCREL_CALL
, R_ARM_CALL
},
1811 {BFD_RELOC_ARM_PCREL_JUMP
, R_ARM_JUMP24
},
1812 {BFD_RELOC_ARM_PCREL_BLX
, R_ARM_XPC25
},
1813 {BFD_RELOC_THUMB_PCREL_BLX
, R_ARM_THM_XPC22
},
1814 {BFD_RELOC_32
, R_ARM_ABS32
},
1815 {BFD_RELOC_32_PCREL
, R_ARM_REL32
},
1816 {BFD_RELOC_8
, R_ARM_ABS8
},
1817 {BFD_RELOC_16
, R_ARM_ABS16
},
1818 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
},
1819 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
},
1820 {BFD_RELOC_THUMB_PCREL_BRANCH25
, R_ARM_THM_JUMP24
},
1821 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_CALL
},
1822 {BFD_RELOC_THUMB_PCREL_BRANCH12
, R_ARM_THM_JUMP11
},
1823 {BFD_RELOC_THUMB_PCREL_BRANCH20
, R_ARM_THM_JUMP19
},
1824 {BFD_RELOC_THUMB_PCREL_BRANCH9
, R_ARM_THM_JUMP8
},
1825 {BFD_RELOC_THUMB_PCREL_BRANCH7
, R_ARM_THM_JUMP6
},
1826 {BFD_RELOC_ARM_GLOB_DAT
, R_ARM_GLOB_DAT
},
1827 {BFD_RELOC_ARM_JUMP_SLOT
, R_ARM_JUMP_SLOT
},
1828 {BFD_RELOC_ARM_RELATIVE
, R_ARM_RELATIVE
},
1829 {BFD_RELOC_ARM_GOTOFF
, R_ARM_GOTOFF32
},
1830 {BFD_RELOC_ARM_GOTPC
, R_ARM_GOTPC
},
1831 {BFD_RELOC_ARM_GOT_PREL
, R_ARM_GOT_PREL
},
1832 {BFD_RELOC_ARM_GOT32
, R_ARM_GOT32
},
1833 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1834 {BFD_RELOC_ARM_TARGET1
, R_ARM_TARGET1
},
1835 {BFD_RELOC_ARM_ROSEGREL32
, R_ARM_ROSEGREL32
},
1836 {BFD_RELOC_ARM_SBREL32
, R_ARM_SBREL32
},
1837 {BFD_RELOC_ARM_PREL31
, R_ARM_PREL31
},
1838 {BFD_RELOC_ARM_TARGET2
, R_ARM_TARGET2
},
1839 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1840 {BFD_RELOC_ARM_TLS_GOTDESC
, R_ARM_TLS_GOTDESC
},
1841 {BFD_RELOC_ARM_TLS_CALL
, R_ARM_TLS_CALL
},
1842 {BFD_RELOC_ARM_THM_TLS_CALL
, R_ARM_THM_TLS_CALL
},
1843 {BFD_RELOC_ARM_TLS_DESCSEQ
, R_ARM_TLS_DESCSEQ
},
1844 {BFD_RELOC_ARM_THM_TLS_DESCSEQ
, R_ARM_THM_TLS_DESCSEQ
},
1845 {BFD_RELOC_ARM_TLS_DESC
, R_ARM_TLS_DESC
},
1846 {BFD_RELOC_ARM_TLS_GD32
, R_ARM_TLS_GD32
},
1847 {BFD_RELOC_ARM_TLS_LDO32
, R_ARM_TLS_LDO32
},
1848 {BFD_RELOC_ARM_TLS_LDM32
, R_ARM_TLS_LDM32
},
1849 {BFD_RELOC_ARM_TLS_DTPMOD32
, R_ARM_TLS_DTPMOD32
},
1850 {BFD_RELOC_ARM_TLS_DTPOFF32
, R_ARM_TLS_DTPOFF32
},
1851 {BFD_RELOC_ARM_TLS_TPOFF32
, R_ARM_TLS_TPOFF32
},
1852 {BFD_RELOC_ARM_TLS_IE32
, R_ARM_TLS_IE32
},
1853 {BFD_RELOC_ARM_TLS_LE32
, R_ARM_TLS_LE32
},
1854 {BFD_RELOC_ARM_IRELATIVE
, R_ARM_IRELATIVE
},
1855 {BFD_RELOC_VTABLE_INHERIT
, R_ARM_GNU_VTINHERIT
},
1856 {BFD_RELOC_VTABLE_ENTRY
, R_ARM_GNU_VTENTRY
},
1857 {BFD_RELOC_ARM_MOVW
, R_ARM_MOVW_ABS_NC
},
1858 {BFD_RELOC_ARM_MOVT
, R_ARM_MOVT_ABS
},
1859 {BFD_RELOC_ARM_MOVW_PCREL
, R_ARM_MOVW_PREL_NC
},
1860 {BFD_RELOC_ARM_MOVT_PCREL
, R_ARM_MOVT_PREL
},
1861 {BFD_RELOC_ARM_THUMB_MOVW
, R_ARM_THM_MOVW_ABS_NC
},
1862 {BFD_RELOC_ARM_THUMB_MOVT
, R_ARM_THM_MOVT_ABS
},
1863 {BFD_RELOC_ARM_THUMB_MOVW_PCREL
, R_ARM_THM_MOVW_PREL_NC
},
1864 {BFD_RELOC_ARM_THUMB_MOVT_PCREL
, R_ARM_THM_MOVT_PREL
},
1865 {BFD_RELOC_ARM_ALU_PC_G0_NC
, R_ARM_ALU_PC_G0_NC
},
1866 {BFD_RELOC_ARM_ALU_PC_G0
, R_ARM_ALU_PC_G0
},
1867 {BFD_RELOC_ARM_ALU_PC_G1_NC
, R_ARM_ALU_PC_G1_NC
},
1868 {BFD_RELOC_ARM_ALU_PC_G1
, R_ARM_ALU_PC_G1
},
1869 {BFD_RELOC_ARM_ALU_PC_G2
, R_ARM_ALU_PC_G2
},
1870 {BFD_RELOC_ARM_LDR_PC_G0
, R_ARM_LDR_PC_G0
},
1871 {BFD_RELOC_ARM_LDR_PC_G1
, R_ARM_LDR_PC_G1
},
1872 {BFD_RELOC_ARM_LDR_PC_G2
, R_ARM_LDR_PC_G2
},
1873 {BFD_RELOC_ARM_LDRS_PC_G0
, R_ARM_LDRS_PC_G0
},
1874 {BFD_RELOC_ARM_LDRS_PC_G1
, R_ARM_LDRS_PC_G1
},
1875 {BFD_RELOC_ARM_LDRS_PC_G2
, R_ARM_LDRS_PC_G2
},
1876 {BFD_RELOC_ARM_LDC_PC_G0
, R_ARM_LDC_PC_G0
},
1877 {BFD_RELOC_ARM_LDC_PC_G1
, R_ARM_LDC_PC_G1
},
1878 {BFD_RELOC_ARM_LDC_PC_G2
, R_ARM_LDC_PC_G2
},
1879 {BFD_RELOC_ARM_ALU_SB_G0_NC
, R_ARM_ALU_SB_G0_NC
},
1880 {BFD_RELOC_ARM_ALU_SB_G0
, R_ARM_ALU_SB_G0
},
1881 {BFD_RELOC_ARM_ALU_SB_G1_NC
, R_ARM_ALU_SB_G1_NC
},
1882 {BFD_RELOC_ARM_ALU_SB_G1
, R_ARM_ALU_SB_G1
},
1883 {BFD_RELOC_ARM_ALU_SB_G2
, R_ARM_ALU_SB_G2
},
1884 {BFD_RELOC_ARM_LDR_SB_G0
, R_ARM_LDR_SB_G0
},
1885 {BFD_RELOC_ARM_LDR_SB_G1
, R_ARM_LDR_SB_G1
},
1886 {BFD_RELOC_ARM_LDR_SB_G2
, R_ARM_LDR_SB_G2
},
1887 {BFD_RELOC_ARM_LDRS_SB_G0
, R_ARM_LDRS_SB_G0
},
1888 {BFD_RELOC_ARM_LDRS_SB_G1
, R_ARM_LDRS_SB_G1
},
1889 {BFD_RELOC_ARM_LDRS_SB_G2
, R_ARM_LDRS_SB_G2
},
1890 {BFD_RELOC_ARM_LDC_SB_G0
, R_ARM_LDC_SB_G0
},
1891 {BFD_RELOC_ARM_LDC_SB_G1
, R_ARM_LDC_SB_G1
},
1892 {BFD_RELOC_ARM_LDC_SB_G2
, R_ARM_LDC_SB_G2
},
1893 {BFD_RELOC_ARM_V4BX
, R_ARM_V4BX
}
1896 static reloc_howto_type
*
1897 elf32_arm_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1898 bfd_reloc_code_real_type code
)
1902 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_reloc_map
); i
++)
1903 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
1904 return elf32_arm_howto_from_type (elf32_arm_reloc_map
[i
].elf_reloc_val
);
1909 static reloc_howto_type
*
1910 elf32_arm_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1915 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_1
); i
++)
1916 if (elf32_arm_howto_table_1
[i
].name
!= NULL
1917 && strcasecmp (elf32_arm_howto_table_1
[i
].name
, r_name
) == 0)
1918 return &elf32_arm_howto_table_1
[i
];
1920 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_2
); i
++)
1921 if (elf32_arm_howto_table_2
[i
].name
!= NULL
1922 && strcasecmp (elf32_arm_howto_table_2
[i
].name
, r_name
) == 0)
1923 return &elf32_arm_howto_table_2
[i
];
1925 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_3
); i
++)
1926 if (elf32_arm_howto_table_3
[i
].name
!= NULL
1927 && strcasecmp (elf32_arm_howto_table_3
[i
].name
, r_name
) == 0)
1928 return &elf32_arm_howto_table_3
[i
];
1933 /* Support for core dump NOTE sections. */
1936 elf32_arm_nabi_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
1941 switch (note
->descsz
)
1946 case 148: /* Linux/ARM 32-bit. */
1948 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
1951 elf_tdata (abfd
)->core_lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
1960 /* Make a ".reg/999" section. */
1961 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
1962 size
, note
->descpos
+ offset
);
1966 elf32_arm_nabi_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
1968 switch (note
->descsz
)
1973 case 124: /* Linux/ARM elf_prpsinfo. */
1974 elf_tdata (abfd
)->core_pid
1975 = bfd_get_32 (abfd
, note
->descdata
+ 12);
1976 elf_tdata (abfd
)->core_program
1977 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
1978 elf_tdata (abfd
)->core_command
1979 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
1982 /* Note that for some reason, a spurious space is tacked
1983 onto the end of the args in some (at least one anyway)
1984 implementations, so strip it off if it exists. */
1986 char *command
= elf_tdata (abfd
)->core_command
;
1987 int n
= strlen (command
);
1989 if (0 < n
&& command
[n
- 1] == ' ')
1990 command
[n
- 1] = '\0';
1997 elf32_arm_nabi_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
2010 va_start (ap
, note_type
);
2011 memset (data
, 0, sizeof (data
));
2012 strncpy (data
+ 28, va_arg (ap
, const char *), 16);
2013 strncpy (data
+ 44, va_arg (ap
, const char *), 80);
2016 return elfcore_write_note (abfd
, buf
, bufsiz
,
2017 "CORE", note_type
, data
, sizeof (data
));
2028 va_start (ap
, note_type
);
2029 memset (data
, 0, sizeof (data
));
2030 pid
= va_arg (ap
, long);
2031 bfd_put_32 (abfd
, pid
, data
+ 24);
2032 cursig
= va_arg (ap
, int);
2033 bfd_put_16 (abfd
, cursig
, data
+ 12);
2034 greg
= va_arg (ap
, const void *);
2035 memcpy (data
+ 72, greg
, 72);
2038 return elfcore_write_note (abfd
, buf
, bufsiz
,
2039 "CORE", note_type
, data
, sizeof (data
));
2044 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
2045 #define TARGET_LITTLE_NAME "elf32-littlearm"
2046 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
2047 #define TARGET_BIG_NAME "elf32-bigarm"
2049 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
2050 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
2051 #define elf_backend_write_core_note elf32_arm_nabi_write_core_note
2053 typedef unsigned long int insn32
;
2054 typedef unsigned short int insn16
;
2056 /* In lieu of proper flags, assume all EABIv4 or later objects are
2058 #define INTERWORK_FLAG(abfd) \
2059 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
2060 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
2061 || ((abfd)->flags & BFD_LINKER_CREATED))
2063 /* The linker script knows the section names for placement.
2064 The entry_names are used to do simple name mangling on the stubs.
2065 Given a function name, and its type, the stub can be found. The
2066 name can be changed. The only requirement is the %s be present. */
2067 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
2068 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
2070 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
2071 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
2073 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
2074 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
2076 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
2077 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
2079 #define STUB_ENTRY_NAME "__%s_veneer"
2081 /* The name of the dynamic interpreter. This is put in the .interp
2083 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2085 static const unsigned long tls_trampoline
[] =
2087 0xe08e0000, /* add r0, lr, r0 */
2088 0xe5901004, /* ldr r1, [r0,#4] */
2089 0xe12fff11, /* bx r1 */
2092 static const unsigned long dl_tlsdesc_lazy_trampoline
[] =
2094 0xe52d2004, /* push {r2} */
2095 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2096 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2097 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2098 0xe081100f, /* 2: add r1, pc */
2099 0xe12fff12, /* bx r2 */
2100 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
2101 + dl_tlsdesc_lazy_resolver(GOT) */
2102 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2105 #ifdef FOUR_WORD_PLT
2107 /* The first entry in a procedure linkage table looks like
2108 this. It is set up so that any shared library function that is
2109 called before the relocation has been set up calls the dynamic
2111 static const bfd_vma elf32_arm_plt0_entry
[] =
2113 0xe52de004, /* str lr, [sp, #-4]! */
2114 0xe59fe010, /* ldr lr, [pc, #16] */
2115 0xe08fe00e, /* add lr, pc, lr */
2116 0xe5bef008, /* ldr pc, [lr, #8]! */
2119 /* Subsequent entries in a procedure linkage table look like
2121 static const bfd_vma elf32_arm_plt_entry
[] =
2123 0xe28fc600, /* add ip, pc, #NN */
2124 0xe28cca00, /* add ip, ip, #NN */
2125 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2126 0x00000000, /* unused */
2131 /* The first entry in a procedure linkage table looks like
2132 this. It is set up so that any shared library function that is
2133 called before the relocation has been set up calls the dynamic
2135 static const bfd_vma elf32_arm_plt0_entry
[] =
2137 0xe52de004, /* str lr, [sp, #-4]! */
2138 0xe59fe004, /* ldr lr, [pc, #4] */
2139 0xe08fe00e, /* add lr, pc, lr */
2140 0xe5bef008, /* ldr pc, [lr, #8]! */
2141 0x00000000, /* &GOT[0] - . */
2144 /* Subsequent entries in a procedure linkage table look like
2146 static const bfd_vma elf32_arm_plt_entry
[] =
2148 0xe28fc600, /* add ip, pc, #0xNN00000 */
2149 0xe28cca00, /* add ip, ip, #0xNN000 */
2150 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2155 /* The format of the first entry in the procedure linkage table
2156 for a VxWorks executable. */
2157 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry
[] =
2159 0xe52dc008, /* str ip,[sp,#-8]! */
2160 0xe59fc000, /* ldr ip,[pc] */
2161 0xe59cf008, /* ldr pc,[ip,#8] */
2162 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
2165 /* The format of subsequent entries in a VxWorks executable. */
2166 static const bfd_vma elf32_arm_vxworks_exec_plt_entry
[] =
2168 0xe59fc000, /* ldr ip,[pc] */
2169 0xe59cf000, /* ldr pc,[ip] */
2170 0x00000000, /* .long @got */
2171 0xe59fc000, /* ldr ip,[pc] */
2172 0xea000000, /* b _PLT */
2173 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2176 /* The format of entries in a VxWorks shared library. */
2177 static const bfd_vma elf32_arm_vxworks_shared_plt_entry
[] =
2179 0xe59fc000, /* ldr ip,[pc] */
2180 0xe79cf009, /* ldr pc,[ip,r9] */
2181 0x00000000, /* .long @got */
2182 0xe59fc000, /* ldr ip,[pc] */
2183 0xe599f008, /* ldr pc,[r9,#8] */
2184 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2187 /* An initial stub used if the PLT entry is referenced from Thumb code. */
2188 #define PLT_THUMB_STUB_SIZE 4
2189 static const bfd_vma elf32_arm_plt_thumb_stub
[] =
2195 /* The entries in a PLT when using a DLL-based target with multiple
2197 static const bfd_vma elf32_arm_symbian_plt_entry
[] =
2199 0xe51ff004, /* ldr pc, [pc, #-4] */
2200 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2203 /* The first entry in a procedure linkage table looks like
2204 this. It is set up so that any shared library function that is
2205 called before the relocation has been set up calls the dynamic
2207 static const bfd_vma elf32_arm_nacl_plt0_entry
[] =
2210 0xe300c000, /* movw ip, #:lower16:&GOT[2]-.+8 */
2211 0xe340c000, /* movt ip, #:upper16:&GOT[2]-.+8 */
2212 0xe08cc00f, /* add ip, ip, pc */
2213 0xe52dc008, /* str ip, [sp, #-8]! */
2214 /* Second bundle: */
2215 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2216 0xe59cc000, /* ldr ip, [ip] */
2217 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2218 0xe12fff1c, /* bx ip */
2220 0xe320f000, /* nop */
2221 0xe320f000, /* nop */
2222 0xe320f000, /* nop */
2224 0xe50dc004, /* str ip, [sp, #-4] */
2225 /* Fourth bundle: */
2226 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2227 0xe59cc000, /* ldr ip, [ip] */
2228 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2229 0xe12fff1c, /* bx ip */
2231 #define ARM_NACL_PLT_TAIL_OFFSET (11 * 4)
2233 /* Subsequent entries in a procedure linkage table look like this. */
2234 static const bfd_vma elf32_arm_nacl_plt_entry
[] =
2236 0xe300c000, /* movw ip, #:lower16:&GOT[n]-.+8 */
2237 0xe340c000, /* movt ip, #:upper16:&GOT[n]-.+8 */
2238 0xe08cc00f, /* add ip, ip, pc */
2239 0xea000000, /* b .Lplt_tail */
2242 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2243 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2244 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2245 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2246 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2247 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2257 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2258 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2259 is inserted in arm_build_one_stub(). */
2260 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2261 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2262 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2263 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2264 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2265 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2270 enum stub_insn_type type
;
2271 unsigned int r_type
;
2275 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2276 to reach the stub if necessary. */
2277 static const insn_sequence elf32_arm_stub_long_branch_any_any
[] =
2279 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2280 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2283 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2285 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb
[] =
2287 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2288 ARM_INSN (0xe12fff1c), /* bx ip */
2289 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2292 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2293 static const insn_sequence elf32_arm_stub_long_branch_thumb_only
[] =
2295 THUMB16_INSN (0xb401), /* push {r0} */
2296 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2297 THUMB16_INSN (0x4684), /* mov ip, r0 */
2298 THUMB16_INSN (0xbc01), /* pop {r0} */
2299 THUMB16_INSN (0x4760), /* bx ip */
2300 THUMB16_INSN (0xbf00), /* nop */
2301 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2304 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2306 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb
[] =
2308 THUMB16_INSN (0x4778), /* bx pc */
2309 THUMB16_INSN (0x46c0), /* nop */
2310 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2311 ARM_INSN (0xe12fff1c), /* bx ip */
2312 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2315 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2317 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm
[] =
2319 THUMB16_INSN (0x4778), /* bx pc */
2320 THUMB16_INSN (0x46c0), /* nop */
2321 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2322 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2325 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2326 one, when the destination is close enough. */
2327 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm
[] =
2329 THUMB16_INSN (0x4778), /* bx pc */
2330 THUMB16_INSN (0x46c0), /* nop */
2331 ARM_REL_INSN (0xea000000, -8), /* b (X-8) */
2334 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2335 blx to reach the stub if necessary. */
2336 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic
[] =
2338 ARM_INSN (0xe59fc000), /* ldr ip, [pc] */
2339 ARM_INSN (0xe08ff00c), /* add pc, pc, ip */
2340 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2343 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2344 blx to reach the stub if necessary. We can not add into pc;
2345 it is not guaranteed to mode switch (different in ARMv6 and
2347 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic
[] =
2349 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2350 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2351 ARM_INSN (0xe12fff1c), /* bx ip */
2352 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2355 /* V4T ARM -> ARM long branch stub, PIC. */
2356 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic
[] =
2358 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2359 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2360 ARM_INSN (0xe12fff1c), /* bx ip */
2361 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2364 /* V4T Thumb -> ARM long branch stub, PIC. */
2365 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic
[] =
2367 THUMB16_INSN (0x4778), /* bx pc */
2368 THUMB16_INSN (0x46c0), /* nop */
2369 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2370 ARM_INSN (0xe08cf00f), /* add pc, ip, pc */
2371 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2374 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2376 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic
[] =
2378 THUMB16_INSN (0xb401), /* push {r0} */
2379 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2380 THUMB16_INSN (0x46fc), /* mov ip, pc */
2381 THUMB16_INSN (0x4484), /* add ip, r0 */
2382 THUMB16_INSN (0xbc01), /* pop {r0} */
2383 THUMB16_INSN (0x4760), /* bx ip */
2384 DATA_WORD (0, R_ARM_REL32
, 4), /* dcd R_ARM_REL32(X) */
2387 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2389 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic
[] =
2391 THUMB16_INSN (0x4778), /* bx pc */
2392 THUMB16_INSN (0x46c0), /* nop */
2393 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2394 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2395 ARM_INSN (0xe12fff1c), /* bx ip */
2396 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2399 /* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2400 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2401 static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic
[] =
2403 ARM_INSN (0xe59f1000), /* ldr r1, [pc] */
2404 ARM_INSN (0xe08ff001), /* add pc, pc, r1 */
2405 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2408 /* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2409 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2410 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic
[] =
2412 THUMB16_INSN (0x4778), /* bx pc */
2413 THUMB16_INSN (0x46c0), /* nop */
2414 ARM_INSN (0xe59f1000), /* ldr r1, [pc, #0] */
2415 ARM_INSN (0xe081f00f), /* add pc, r1, pc */
2416 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2419 /* Cortex-A8 erratum-workaround stubs. */
2421 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2422 can't use a conditional branch to reach this stub). */
2424 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond
[] =
2426 THUMB16_BCOND_INSN (0xd001), /* b<cond>.n true. */
2427 THUMB32_B_INSN (0xf000b800, -4), /* b.w insn_after_original_branch. */
2428 THUMB32_B_INSN (0xf000b800, -4) /* true: b.w original_branch_dest. */
2431 /* Stub used for b.w and bl.w instructions. */
2433 static const insn_sequence elf32_arm_stub_a8_veneer_b
[] =
2435 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2438 static const insn_sequence elf32_arm_stub_a8_veneer_bl
[] =
2440 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2443 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2444 instruction (which switches to ARM mode) to point to this stub. Jump to the
2445 real destination using an ARM-mode branch. */
2447 static const insn_sequence elf32_arm_stub_a8_veneer_blx
[] =
2449 ARM_REL_INSN (0xea000000, -8) /* b original_branch_dest. */
2452 /* For each section group there can be a specially created linker section
2453 to hold the stubs for that group. The name of the stub section is based
2454 upon the name of another section within that group with the suffix below
2457 PR 13049: STUB_SUFFIX used to be ".stub", but this allowed the user to
2458 create what appeared to be a linker stub section when it actually
2459 contained user code/data. For example, consider this fragment:
2461 const char * stubborn_problems[] = { "np" };
2463 If this is compiled with "-fPIC -fdata-sections" then gcc produces a
2466 .data.rel.local.stubborn_problems
2468 This then causes problems in arm32_arm_build_stubs() as it triggers:
2470 // Ignore non-stub sections.
2471 if (!strstr (stub_sec->name, STUB_SUFFIX))
2474 And so the section would be ignored instead of being processed. Hence
2475 the change in definition of STUB_SUFFIX to a name that cannot be a valid
2477 #define STUB_SUFFIX ".__stub"
2479 /* One entry per long/short branch stub defined above. */
2481 DEF_STUB(long_branch_any_any) \
2482 DEF_STUB(long_branch_v4t_arm_thumb) \
2483 DEF_STUB(long_branch_thumb_only) \
2484 DEF_STUB(long_branch_v4t_thumb_thumb) \
2485 DEF_STUB(long_branch_v4t_thumb_arm) \
2486 DEF_STUB(short_branch_v4t_thumb_arm) \
2487 DEF_STUB(long_branch_any_arm_pic) \
2488 DEF_STUB(long_branch_any_thumb_pic) \
2489 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2490 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2491 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2492 DEF_STUB(long_branch_thumb_only_pic) \
2493 DEF_STUB(long_branch_any_tls_pic) \
2494 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
2495 DEF_STUB(a8_veneer_b_cond) \
2496 DEF_STUB(a8_veneer_b) \
2497 DEF_STUB(a8_veneer_bl) \
2498 DEF_STUB(a8_veneer_blx)
2500 #define DEF_STUB(x) arm_stub_##x,
2501 enum elf32_arm_stub_type
2505 /* Note the first a8_veneer type */
2506 arm_stub_a8_veneer_lwm
= arm_stub_a8_veneer_b_cond
2512 const insn_sequence
* template_sequence
;
2516 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2517 static const stub_def stub_definitions
[] =
2523 struct elf32_arm_stub_hash_entry
2525 /* Base hash table entry structure. */
2526 struct bfd_hash_entry root
;
2528 /* The stub section. */
2531 /* Offset within stub_sec of the beginning of this stub. */
2532 bfd_vma stub_offset
;
2534 /* Given the symbol's value and its section we can determine its final
2535 value when building the stubs (so the stub knows where to jump). */
2536 bfd_vma target_value
;
2537 asection
*target_section
;
2539 /* Offset to apply to relocation referencing target_value. */
2540 bfd_vma target_addend
;
2542 /* The instruction which caused this stub to be generated (only valid for
2543 Cortex-A8 erratum workaround stubs at present). */
2544 unsigned long orig_insn
;
2546 /* The stub type. */
2547 enum elf32_arm_stub_type stub_type
;
2548 /* Its encoding size in bytes. */
2551 const insn_sequence
*stub_template
;
2552 /* The size of the template (number of entries). */
2553 int stub_template_size
;
2555 /* The symbol table entry, if any, that this was derived from. */
2556 struct elf32_arm_link_hash_entry
*h
;
2558 /* Type of branch. */
2559 enum arm_st_branch_type branch_type
;
2561 /* Where this stub is being called from, or, in the case of combined
2562 stub sections, the first input section in the group. */
2565 /* The name for the local symbol at the start of this stub. The
2566 stub name in the hash table has to be unique; this does not, so
2567 it can be friendlier. */
2571 /* Used to build a map of a section. This is required for mixed-endian
2574 typedef struct elf32_elf_section_map
2579 elf32_arm_section_map
;
2581 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2585 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
,
2586 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
,
2587 VFP11_ERRATUM_ARM_VENEER
,
2588 VFP11_ERRATUM_THUMB_VENEER
2590 elf32_vfp11_erratum_type
;
2592 typedef struct elf32_vfp11_erratum_list
2594 struct elf32_vfp11_erratum_list
*next
;
2600 struct elf32_vfp11_erratum_list
*veneer
;
2601 unsigned int vfp_insn
;
2605 struct elf32_vfp11_erratum_list
*branch
;
2609 elf32_vfp11_erratum_type type
;
2611 elf32_vfp11_erratum_list
;
2616 INSERT_EXIDX_CANTUNWIND_AT_END
2618 arm_unwind_edit_type
;
2620 /* A (sorted) list of edits to apply to an unwind table. */
2621 typedef struct arm_unwind_table_edit
2623 arm_unwind_edit_type type
;
2624 /* Note: we sometimes want to insert an unwind entry corresponding to a
2625 section different from the one we're currently writing out, so record the
2626 (text) section this edit relates to here. */
2627 asection
*linked_section
;
2629 struct arm_unwind_table_edit
*next
;
2631 arm_unwind_table_edit
;
2633 typedef struct _arm_elf_section_data
2635 /* Information about mapping symbols. */
2636 struct bfd_elf_section_data elf
;
2637 unsigned int mapcount
;
2638 unsigned int mapsize
;
2639 elf32_arm_section_map
*map
;
2640 /* Information about CPU errata. */
2641 unsigned int erratumcount
;
2642 elf32_vfp11_erratum_list
*erratumlist
;
2643 /* Information about unwind tables. */
2646 /* Unwind info attached to a text section. */
2649 asection
*arm_exidx_sec
;
2652 /* Unwind info attached to an .ARM.exidx section. */
2655 arm_unwind_table_edit
*unwind_edit_list
;
2656 arm_unwind_table_edit
*unwind_edit_tail
;
2660 _arm_elf_section_data
;
2662 #define elf32_arm_section_data(sec) \
2663 ((_arm_elf_section_data *) elf_section_data (sec))
2665 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2666 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2667 so may be created multiple times: we use an array of these entries whilst
2668 relaxing which we can refresh easily, then create stubs for each potentially
2669 erratum-triggering instruction once we've settled on a solution. */
2671 struct a8_erratum_fix
2677 unsigned long orig_insn
;
2679 enum elf32_arm_stub_type stub_type
;
2680 enum arm_st_branch_type branch_type
;
2683 /* A table of relocs applied to branches which might trigger Cortex-A8
2686 struct a8_erratum_reloc
2689 bfd_vma destination
;
2690 struct elf32_arm_link_hash_entry
*hash
;
2691 const char *sym_name
;
2692 unsigned int r_type
;
2693 enum arm_st_branch_type branch_type
;
2694 bfd_boolean non_a8_stub
;
2697 /* The size of the thread control block. */
2700 /* ARM-specific information about a PLT entry, over and above the usual
2704 /* We reference count Thumb references to a PLT entry separately,
2705 so that we can emit the Thumb trampoline only if needed. */
2706 bfd_signed_vma thumb_refcount
;
2708 /* Some references from Thumb code may be eliminated by BL->BLX
2709 conversion, so record them separately. */
2710 bfd_signed_vma maybe_thumb_refcount
;
2712 /* How many of the recorded PLT accesses were from non-call relocations.
2713 This information is useful when deciding whether anything takes the
2714 address of an STT_GNU_IFUNC PLT. A value of 0 means that all
2715 non-call references to the function should resolve directly to the
2716 real runtime target. */
2717 unsigned int noncall_refcount
;
2719 /* Since PLT entries have variable size if the Thumb prologue is
2720 used, we need to record the index into .got.plt instead of
2721 recomputing it from the PLT offset. */
2722 bfd_signed_vma got_offset
;
2725 /* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */
2726 struct arm_local_iplt_info
2728 /* The information that is usually found in the generic ELF part of
2729 the hash table entry. */
2730 union gotplt_union root
;
2732 /* The information that is usually found in the ARM-specific part of
2733 the hash table entry. */
2734 struct arm_plt_info arm
;
2736 /* A list of all potential dynamic relocations against this symbol. */
2737 struct elf_dyn_relocs
*dyn_relocs
;
2740 struct elf_arm_obj_tdata
2742 struct elf_obj_tdata root
;
2744 /* tls_type for each local got entry. */
2745 char *local_got_tls_type
;
2747 /* GOTPLT entries for TLS descriptors. */
2748 bfd_vma
*local_tlsdesc_gotent
;
2750 /* Information for local symbols that need entries in .iplt. */
2751 struct arm_local_iplt_info
**local_iplt
;
2753 /* Zero to warn when linking objects with incompatible enum sizes. */
2754 int no_enum_size_warning
;
2756 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2757 int no_wchar_size_warning
;
2760 #define elf_arm_tdata(bfd) \
2761 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2763 #define elf32_arm_local_got_tls_type(bfd) \
2764 (elf_arm_tdata (bfd)->local_got_tls_type)
2766 #define elf32_arm_local_tlsdesc_gotent(bfd) \
2767 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
2769 #define elf32_arm_local_iplt(bfd) \
2770 (elf_arm_tdata (bfd)->local_iplt)
2772 #define is_arm_elf(bfd) \
2773 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2774 && elf_tdata (bfd) != NULL \
2775 && elf_object_id (bfd) == ARM_ELF_DATA)
2778 elf32_arm_mkobject (bfd
*abfd
)
2780 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_arm_obj_tdata
),
2784 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2786 /* Arm ELF linker hash entry. */
2787 struct elf32_arm_link_hash_entry
2789 struct elf_link_hash_entry root
;
2791 /* Track dynamic relocs copied for this symbol. */
2792 struct elf_dyn_relocs
*dyn_relocs
;
2794 /* ARM-specific PLT information. */
2795 struct arm_plt_info plt
;
2797 #define GOT_UNKNOWN 0
2798 #define GOT_NORMAL 1
2799 #define GOT_TLS_GD 2
2800 #define GOT_TLS_IE 4
2801 #define GOT_TLS_GDESC 8
2802 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
2803 unsigned int tls_type
: 8;
2805 /* True if the symbol's PLT entry is in .iplt rather than .plt. */
2806 unsigned int is_iplt
: 1;
2808 unsigned int unused
: 23;
2810 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
2811 starting at the end of the jump table. */
2812 bfd_vma tlsdesc_got
;
2814 /* The symbol marking the real symbol location for exported thumb
2815 symbols with Arm stubs. */
2816 struct elf_link_hash_entry
*export_glue
;
2818 /* A pointer to the most recently used stub hash entry against this
2820 struct elf32_arm_stub_hash_entry
*stub_cache
;
2823 /* Traverse an arm ELF linker hash table. */
2824 #define elf32_arm_link_hash_traverse(table, func, info) \
2825 (elf_link_hash_traverse \
2827 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2830 /* Get the ARM elf linker hash table from a link_info structure. */
2831 #define elf32_arm_hash_table(info) \
2832 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
2833 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
2835 #define arm_stub_hash_lookup(table, string, create, copy) \
2836 ((struct elf32_arm_stub_hash_entry *) \
2837 bfd_hash_lookup ((table), (string), (create), (copy)))
2839 /* Array to keep track of which stub sections have been created, and
2840 information on stub grouping. */
2843 /* This is the section to which stubs in the group will be
2846 /* The stub section. */
2850 #define elf32_arm_compute_jump_table_size(htab) \
2851 ((htab)->next_tls_desc_index * 4)
2853 /* ARM ELF linker hash table. */
2854 struct elf32_arm_link_hash_table
2856 /* The main hash table. */
2857 struct elf_link_hash_table root
;
2859 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2860 bfd_size_type thumb_glue_size
;
2862 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2863 bfd_size_type arm_glue_size
;
2865 /* The size in bytes of section containing the ARMv4 BX veneers. */
2866 bfd_size_type bx_glue_size
;
2868 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2869 veneer has been populated. */
2870 bfd_vma bx_glue_offset
[15];
2872 /* The size in bytes of the section containing glue for VFP11 erratum
2874 bfd_size_type vfp11_erratum_glue_size
;
2876 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
2877 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
2878 elf32_arm_write_section(). */
2879 struct a8_erratum_fix
*a8_erratum_fixes
;
2880 unsigned int num_a8_erratum_fixes
;
2882 /* An arbitrary input BFD chosen to hold the glue sections. */
2883 bfd
* bfd_of_glue_owner
;
2885 /* Nonzero to output a BE8 image. */
2888 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2889 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2892 /* The relocation to use for R_ARM_TARGET2 relocations. */
2895 /* 0 = Ignore R_ARM_V4BX.
2896 1 = Convert BX to MOV PC.
2897 2 = Generate v4 interworing stubs. */
2900 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
2903 /* Whether we should fix the ARM1176 BLX immediate issue. */
2906 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2909 /* What sort of code sequences we should look for which may trigger the
2910 VFP11 denorm erratum. */
2911 bfd_arm_vfp11_fix vfp11_fix
;
2913 /* Global counter for the number of fixes we have emitted. */
2914 int num_vfp11_fixes
;
2916 /* Nonzero to force PIC branch veneers. */
2919 /* The number of bytes in the initial entry in the PLT. */
2920 bfd_size_type plt_header_size
;
2922 /* The number of bytes in the subsequent PLT etries. */
2923 bfd_size_type plt_entry_size
;
2925 /* True if the target system is VxWorks. */
2928 /* True if the target system is Symbian OS. */
2931 /* True if the target system is Native Client. */
2934 /* True if the target uses REL relocations. */
2937 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
2938 bfd_vma next_tls_desc_index
;
2940 /* How many R_ARM_TLS_DESC relocations were generated so far. */
2941 bfd_vma num_tls_desc
;
2943 /* Short-cuts to get to dynamic linker sections. */
2947 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2950 /* The offset into splt of the PLT entry for the TLS descriptor
2951 resolver. Special values are 0, if not necessary (or not found
2952 to be necessary yet), and -1 if needed but not determined
2954 bfd_vma dt_tlsdesc_plt
;
2956 /* The offset into sgot of the GOT entry used by the PLT entry
2958 bfd_vma dt_tlsdesc_got
;
2960 /* Offset in .plt section of tls_arm_trampoline. */
2961 bfd_vma tls_trampoline
;
2963 /* Data for R_ARM_TLS_LDM32 relocations. */
2966 bfd_signed_vma refcount
;
2970 /* Small local sym cache. */
2971 struct sym_cache sym_cache
;
2973 /* For convenience in allocate_dynrelocs. */
2976 /* The amount of space used by the reserved portion of the sgotplt
2977 section, plus whatever space is used by the jump slots. */
2978 bfd_vma sgotplt_jump_table_size
;
2980 /* The stub hash table. */
2981 struct bfd_hash_table stub_hash_table
;
2983 /* Linker stub bfd. */
2986 /* Linker call-backs. */
2987 asection
* (*add_stub_section
) (const char *, asection
*);
2988 void (*layout_sections_again
) (void);
2990 /* Array to keep track of which stub sections have been created, and
2991 information on stub grouping. */
2992 struct map_stub
*stub_group
;
2994 /* Number of elements in stub_group. */
2997 /* Assorted information used by elf32_arm_size_stubs. */
2998 unsigned int bfd_count
;
3000 asection
**input_list
;
3003 /* Create an entry in an ARM ELF linker hash table. */
3005 static struct bfd_hash_entry
*
3006 elf32_arm_link_hash_newfunc (struct bfd_hash_entry
* entry
,
3007 struct bfd_hash_table
* table
,
3008 const char * string
)
3010 struct elf32_arm_link_hash_entry
* ret
=
3011 (struct elf32_arm_link_hash_entry
*) entry
;
3013 /* Allocate the structure if it has not already been allocated by a
3016 ret
= (struct elf32_arm_link_hash_entry
*)
3017 bfd_hash_allocate (table
, sizeof (struct elf32_arm_link_hash_entry
));
3019 return (struct bfd_hash_entry
*) ret
;
3021 /* Call the allocation method of the superclass. */
3022 ret
= ((struct elf32_arm_link_hash_entry
*)
3023 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
3027 ret
->dyn_relocs
= NULL
;
3028 ret
->tls_type
= GOT_UNKNOWN
;
3029 ret
->tlsdesc_got
= (bfd_vma
) -1;
3030 ret
->plt
.thumb_refcount
= 0;
3031 ret
->plt
.maybe_thumb_refcount
= 0;
3032 ret
->plt
.noncall_refcount
= 0;
3033 ret
->plt
.got_offset
= -1;
3034 ret
->is_iplt
= FALSE
;
3035 ret
->export_glue
= NULL
;
3037 ret
->stub_cache
= NULL
;
3040 return (struct bfd_hash_entry
*) ret
;
3043 /* Ensure that we have allocated bookkeeping structures for ABFD's local
3047 elf32_arm_allocate_local_sym_info (bfd
*abfd
)
3049 if (elf_local_got_refcounts (abfd
) == NULL
)
3051 bfd_size_type num_syms
;
3055 num_syms
= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
3056 size
= num_syms
* (sizeof (bfd_signed_vma
)
3057 + sizeof (struct arm_local_iplt_info
*)
3060 data
= bfd_zalloc (abfd
, size
);
3064 elf_local_got_refcounts (abfd
) = (bfd_signed_vma
*) data
;
3065 data
+= num_syms
* sizeof (bfd_signed_vma
);
3067 elf32_arm_local_iplt (abfd
) = (struct arm_local_iplt_info
**) data
;
3068 data
+= num_syms
* sizeof (struct arm_local_iplt_info
*);
3070 elf32_arm_local_tlsdesc_gotent (abfd
) = (bfd_vma
*) data
;
3071 data
+= num_syms
* sizeof (bfd_vma
);
3073 elf32_arm_local_got_tls_type (abfd
) = data
;
3078 /* Return the .iplt information for local symbol R_SYMNDX, which belongs
3079 to input bfd ABFD. Create the information if it doesn't already exist.
3080 Return null if an allocation fails. */
3082 static struct arm_local_iplt_info
*
3083 elf32_arm_create_local_iplt (bfd
*abfd
, unsigned long r_symndx
)
3085 struct arm_local_iplt_info
**ptr
;
3087 if (!elf32_arm_allocate_local_sym_info (abfd
))
3090 BFD_ASSERT (r_symndx
< elf_tdata (abfd
)->symtab_hdr
.sh_info
);
3091 ptr
= &elf32_arm_local_iplt (abfd
)[r_symndx
];
3093 *ptr
= bfd_zalloc (abfd
, sizeof (**ptr
));
3097 /* Try to obtain PLT information for the symbol with index R_SYMNDX
3098 in ABFD's symbol table. If the symbol is global, H points to its
3099 hash table entry, otherwise H is null.
3101 Return true if the symbol does have PLT information. When returning
3102 true, point *ROOT_PLT at the target-independent reference count/offset
3103 union and *ARM_PLT at the ARM-specific information. */
3106 elf32_arm_get_plt_info (bfd
*abfd
, struct elf32_arm_link_hash_entry
*h
,
3107 unsigned long r_symndx
, union gotplt_union
**root_plt
,
3108 struct arm_plt_info
**arm_plt
)
3110 struct arm_local_iplt_info
*local_iplt
;
3114 *root_plt
= &h
->root
.plt
;
3119 if (elf32_arm_local_iplt (abfd
) == NULL
)
3122 local_iplt
= elf32_arm_local_iplt (abfd
)[r_symndx
];
3123 if (local_iplt
== NULL
)
3126 *root_plt
= &local_iplt
->root
;
3127 *arm_plt
= &local_iplt
->arm
;
3131 /* Return true if the PLT described by ARM_PLT requires a Thumb stub
3135 elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info
*info
,
3136 struct arm_plt_info
*arm_plt
)
3138 struct elf32_arm_link_hash_table
*htab
;
3140 htab
= elf32_arm_hash_table (info
);
3141 return (arm_plt
->thumb_refcount
!= 0
3142 || (!htab
->use_blx
&& arm_plt
->maybe_thumb_refcount
!= 0));
3145 /* Return a pointer to the head of the dynamic reloc list that should
3146 be used for local symbol ISYM, which is symbol number R_SYMNDX in
3147 ABFD's symbol table. Return null if an error occurs. */
3149 static struct elf_dyn_relocs
**
3150 elf32_arm_get_local_dynreloc_list (bfd
*abfd
, unsigned long r_symndx
,
3151 Elf_Internal_Sym
*isym
)
3153 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3155 struct arm_local_iplt_info
*local_iplt
;
3157 local_iplt
= elf32_arm_create_local_iplt (abfd
, r_symndx
);
3158 if (local_iplt
== NULL
)
3160 return &local_iplt
->dyn_relocs
;
3164 /* Track dynamic relocs needed for local syms too.
3165 We really need local syms available to do this
3170 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3174 vpp
= &elf_section_data (s
)->local_dynrel
;
3175 return (struct elf_dyn_relocs
**) vpp
;
3179 /* Initialize an entry in the stub hash table. */
3181 static struct bfd_hash_entry
*
3182 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
3183 struct bfd_hash_table
*table
,
3186 /* Allocate the structure if it has not already been allocated by a
3190 entry
= (struct bfd_hash_entry
*)
3191 bfd_hash_allocate (table
, sizeof (struct elf32_arm_stub_hash_entry
));
3196 /* Call the allocation method of the superclass. */
3197 entry
= bfd_hash_newfunc (entry
, table
, string
);
3200 struct elf32_arm_stub_hash_entry
*eh
;
3202 /* Initialize the local fields. */
3203 eh
= (struct elf32_arm_stub_hash_entry
*) entry
;
3204 eh
->stub_sec
= NULL
;
3205 eh
->stub_offset
= 0;
3206 eh
->target_value
= 0;
3207 eh
->target_section
= NULL
;
3208 eh
->target_addend
= 0;
3210 eh
->stub_type
= arm_stub_none
;
3212 eh
->stub_template
= NULL
;
3213 eh
->stub_template_size
= 0;
3216 eh
->output_name
= NULL
;
3222 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
3223 shortcuts to them in our hash table. */
3226 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
3228 struct elf32_arm_link_hash_table
*htab
;
3230 htab
= elf32_arm_hash_table (info
);
3234 /* BPABI objects never have a GOT, or associated sections. */
3235 if (htab
->symbian_p
)
3238 if (! _bfd_elf_create_got_section (dynobj
, info
))
3244 /* Create the .iplt, .rel(a).iplt and .igot.plt sections. */
3247 create_ifunc_sections (struct bfd_link_info
*info
)
3249 struct elf32_arm_link_hash_table
*htab
;
3250 const struct elf_backend_data
*bed
;
3255 htab
= elf32_arm_hash_table (info
);
3256 dynobj
= htab
->root
.dynobj
;
3257 bed
= get_elf_backend_data (dynobj
);
3258 flags
= bed
->dynamic_sec_flags
;
3260 if (htab
->root
.iplt
== NULL
)
3262 s
= bfd_make_section_anyway_with_flags (dynobj
, ".iplt",
3263 flags
| SEC_READONLY
| SEC_CODE
);
3265 || !bfd_set_section_alignment (dynobj
, s
, bed
->plt_alignment
))
3267 htab
->root
.iplt
= s
;
3270 if (htab
->root
.irelplt
== NULL
)
3272 s
= bfd_make_section_anyway_with_flags (dynobj
,
3273 RELOC_SECTION (htab
, ".iplt"),
3274 flags
| SEC_READONLY
);
3276 || !bfd_set_section_alignment (dynobj
, s
, bed
->s
->log_file_align
))
3278 htab
->root
.irelplt
= s
;
3281 if (htab
->root
.igotplt
== NULL
)
3283 s
= bfd_make_section_anyway_with_flags (dynobj
, ".igot.plt", flags
);
3285 || !bfd_set_section_alignment (dynobj
, s
, bed
->s
->log_file_align
))
3287 htab
->root
.igotplt
= s
;
3292 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
3293 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
3297 elf32_arm_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
3299 struct elf32_arm_link_hash_table
*htab
;
3301 htab
= elf32_arm_hash_table (info
);
3305 if (!htab
->root
.sgot
&& !create_got_section (dynobj
, info
))
3308 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
3311 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
3313 htab
->srelbss
= bfd_get_linker_section (dynobj
,
3314 RELOC_SECTION (htab
, ".bss"));
3316 if (htab
->vxworks_p
)
3318 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
3323 htab
->plt_header_size
= 0;
3324 htab
->plt_entry_size
3325 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry
);
3329 htab
->plt_header_size
3330 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry
);
3331 htab
->plt_entry_size
3332 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry
);
3336 if (!htab
->root
.splt
3337 || !htab
->root
.srelplt
3339 || (!info
->shared
&& !htab
->srelbss
))
3345 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3348 elf32_arm_copy_indirect_symbol (struct bfd_link_info
*info
,
3349 struct elf_link_hash_entry
*dir
,
3350 struct elf_link_hash_entry
*ind
)
3352 struct elf32_arm_link_hash_entry
*edir
, *eind
;
3354 edir
= (struct elf32_arm_link_hash_entry
*) dir
;
3355 eind
= (struct elf32_arm_link_hash_entry
*) ind
;
3357 if (eind
->dyn_relocs
!= NULL
)
3359 if (edir
->dyn_relocs
!= NULL
)
3361 struct elf_dyn_relocs
**pp
;
3362 struct elf_dyn_relocs
*p
;
3364 /* Add reloc counts against the indirect sym to the direct sym
3365 list. Merge any entries against the same section. */
3366 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
3368 struct elf_dyn_relocs
*q
;
3370 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
3371 if (q
->sec
== p
->sec
)
3373 q
->pc_count
+= p
->pc_count
;
3374 q
->count
+= p
->count
;
3381 *pp
= edir
->dyn_relocs
;
3384 edir
->dyn_relocs
= eind
->dyn_relocs
;
3385 eind
->dyn_relocs
= NULL
;
3388 if (ind
->root
.type
== bfd_link_hash_indirect
)
3390 /* Copy over PLT info. */
3391 edir
->plt
.thumb_refcount
+= eind
->plt
.thumb_refcount
;
3392 eind
->plt
.thumb_refcount
= 0;
3393 edir
->plt
.maybe_thumb_refcount
+= eind
->plt
.maybe_thumb_refcount
;
3394 eind
->plt
.maybe_thumb_refcount
= 0;
3395 edir
->plt
.noncall_refcount
+= eind
->plt
.noncall_refcount
;
3396 eind
->plt
.noncall_refcount
= 0;
3398 /* We should only allocate a function to .iplt once the final
3399 symbol information is known. */
3400 BFD_ASSERT (!eind
->is_iplt
);
3402 if (dir
->got
.refcount
<= 0)
3404 edir
->tls_type
= eind
->tls_type
;
3405 eind
->tls_type
= GOT_UNKNOWN
;
3409 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
3412 /* Create an ARM elf linker hash table. */
3414 static struct bfd_link_hash_table
*
3415 elf32_arm_link_hash_table_create (bfd
*abfd
)
3417 struct elf32_arm_link_hash_table
*ret
;
3418 bfd_size_type amt
= sizeof (struct elf32_arm_link_hash_table
);
3420 ret
= (struct elf32_arm_link_hash_table
*) bfd_malloc (amt
);
3424 if (!_bfd_elf_link_hash_table_init (& ret
->root
, abfd
,
3425 elf32_arm_link_hash_newfunc
,
3426 sizeof (struct elf32_arm_link_hash_entry
),
3433 ret
->sdynbss
= NULL
;
3434 ret
->srelbss
= NULL
;
3435 ret
->srelplt2
= NULL
;
3436 ret
->dt_tlsdesc_plt
= 0;
3437 ret
->dt_tlsdesc_got
= 0;
3438 ret
->tls_trampoline
= 0;
3439 ret
->next_tls_desc_index
= 0;
3440 ret
->num_tls_desc
= 0;
3441 ret
->thumb_glue_size
= 0;
3442 ret
->arm_glue_size
= 0;
3443 ret
->bx_glue_size
= 0;
3444 memset (ret
->bx_glue_offset
, 0, sizeof (ret
->bx_glue_offset
));
3445 ret
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
3446 ret
->vfp11_erratum_glue_size
= 0;
3447 ret
->num_vfp11_fixes
= 0;
3448 ret
->fix_cortex_a8
= 0;
3449 ret
->fix_arm1176
= 0;
3450 ret
->bfd_of_glue_owner
= NULL
;
3451 ret
->byteswap_code
= 0;
3452 ret
->target1_is_rel
= 0;
3453 ret
->target2_reloc
= R_ARM_NONE
;
3454 #ifdef FOUR_WORD_PLT
3455 ret
->plt_header_size
= 16;
3456 ret
->plt_entry_size
= 16;
3458 ret
->plt_header_size
= 20;
3459 ret
->plt_entry_size
= 12;
3467 ret
->sym_cache
.abfd
= NULL
;
3469 ret
->tls_ldm_got
.refcount
= 0;
3470 ret
->stub_bfd
= NULL
;
3471 ret
->add_stub_section
= NULL
;
3472 ret
->layout_sections_again
= NULL
;
3473 ret
->stub_group
= NULL
;
3477 ret
->input_list
= NULL
;
3479 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
3480 sizeof (struct elf32_arm_stub_hash_entry
)))
3486 return &ret
->root
.root
;
3489 /* Free the derived linker hash table. */
3492 elf32_arm_hash_table_free (struct bfd_link_hash_table
*hash
)
3494 struct elf32_arm_link_hash_table
*ret
3495 = (struct elf32_arm_link_hash_table
*) hash
;
3497 bfd_hash_table_free (&ret
->stub_hash_table
);
3498 _bfd_generic_link_hash_table_free (hash
);
3501 /* Determine if we're dealing with a Thumb only architecture. */
3504 using_thumb_only (struct elf32_arm_link_hash_table
*globals
)
3506 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3510 if (arch
== TAG_CPU_ARCH_V6_M
|| arch
== TAG_CPU_ARCH_V6S_M
)
3513 if (arch
!= TAG_CPU_ARCH_V7
&& arch
!= TAG_CPU_ARCH_V7E_M
)
3516 profile
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3517 Tag_CPU_arch_profile
);
3519 return profile
== 'M';
3522 /* Determine if we're dealing with a Thumb-2 object. */
3525 using_thumb2 (struct elf32_arm_link_hash_table
*globals
)
3527 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3529 return arch
== TAG_CPU_ARCH_V6T2
|| arch
>= TAG_CPU_ARCH_V7
;
3532 /* Determine what kind of NOPs are available. */
3535 arch_has_arm_nop (struct elf32_arm_link_hash_table
*globals
)
3537 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3539 return arch
== TAG_CPU_ARCH_V6T2
3540 || arch
== TAG_CPU_ARCH_V6K
3541 || arch
== TAG_CPU_ARCH_V7
3542 || arch
== TAG_CPU_ARCH_V7E_M
;
3546 arch_has_thumb2_nop (struct elf32_arm_link_hash_table
*globals
)
3548 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3550 return (arch
== TAG_CPU_ARCH_V6T2
|| arch
== TAG_CPU_ARCH_V7
3551 || arch
== TAG_CPU_ARCH_V7E_M
);
3555 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type
)
3559 case arm_stub_long_branch_thumb_only
:
3560 case arm_stub_long_branch_v4t_thumb_arm
:
3561 case arm_stub_short_branch_v4t_thumb_arm
:
3562 case arm_stub_long_branch_v4t_thumb_arm_pic
:
3563 case arm_stub_long_branch_v4t_thumb_tls_pic
:
3564 case arm_stub_long_branch_thumb_only_pic
:
3575 /* Determine the type of stub needed, if any, for a call. */
3577 static enum elf32_arm_stub_type
3578 arm_type_of_stub (struct bfd_link_info
*info
,
3579 asection
*input_sec
,
3580 const Elf_Internal_Rela
*rel
,
3581 unsigned char st_type
,
3582 enum arm_st_branch_type
*actual_branch_type
,
3583 struct elf32_arm_link_hash_entry
*hash
,
3584 bfd_vma destination
,
3590 bfd_signed_vma branch_offset
;
3591 unsigned int r_type
;
3592 struct elf32_arm_link_hash_table
* globals
;
3595 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
3597 enum arm_st_branch_type branch_type
= *actual_branch_type
;
3598 union gotplt_union
*root_plt
;
3599 struct arm_plt_info
*arm_plt
;
3601 if (branch_type
== ST_BRANCH_LONG
)
3604 globals
= elf32_arm_hash_table (info
);
3605 if (globals
== NULL
)
3608 thumb_only
= using_thumb_only (globals
);
3610 thumb2
= using_thumb2 (globals
);
3612 /* Determine where the call point is. */
3613 location
= (input_sec
->output_offset
3614 + input_sec
->output_section
->vma
3617 r_type
= ELF32_R_TYPE (rel
->r_info
);
3619 /* For TLS call relocs, it is the caller's responsibility to provide
3620 the address of the appropriate trampoline. */
3621 if (r_type
!= R_ARM_TLS_CALL
3622 && r_type
!= R_ARM_THM_TLS_CALL
3623 && elf32_arm_get_plt_info (input_bfd
, hash
, ELF32_R_SYM (rel
->r_info
),
3624 &root_plt
, &arm_plt
)
3625 && root_plt
->offset
!= (bfd_vma
) -1)
3629 if (hash
== NULL
|| hash
->is_iplt
)
3630 splt
= globals
->root
.iplt
;
3632 splt
= globals
->root
.splt
;
3637 /* Note when dealing with PLT entries: the main PLT stub is in
3638 ARM mode, so if the branch is in Thumb mode, another
3639 Thumb->ARM stub will be inserted later just before the ARM
3640 PLT stub. We don't take this extra distance into account
3641 here, because if a long branch stub is needed, we'll add a
3642 Thumb->Arm one and branch directly to the ARM PLT entry
3643 because it avoids spreading offset corrections in several
3646 destination
= (splt
->output_section
->vma
3647 + splt
->output_offset
3648 + root_plt
->offset
);
3650 branch_type
= ST_BRANCH_TO_ARM
;
3653 /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */
3654 BFD_ASSERT (st_type
!= STT_GNU_IFUNC
);
3656 branch_offset
= (bfd_signed_vma
)(destination
- location
);
3658 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
3659 || r_type
== R_ARM_THM_TLS_CALL
)
3661 /* Handle cases where:
3662 - this call goes too far (different Thumb/Thumb2 max
3664 - it's a Thumb->Arm call and blx is not available, or it's a
3665 Thumb->Arm branch (not bl). A stub is needed in this case,
3666 but only if this call is not through a PLT entry. Indeed,
3667 PLT stubs handle mode switching already.
3670 && (branch_offset
> THM_MAX_FWD_BRANCH_OFFSET
3671 || (branch_offset
< THM_MAX_BWD_BRANCH_OFFSET
)))
3673 && (branch_offset
> THM2_MAX_FWD_BRANCH_OFFSET
3674 || (branch_offset
< THM2_MAX_BWD_BRANCH_OFFSET
)))
3675 || (branch_type
== ST_BRANCH_TO_ARM
3676 && (((r_type
== R_ARM_THM_CALL
3677 || r_type
== R_ARM_THM_TLS_CALL
) && !globals
->use_blx
)
3678 || (r_type
== R_ARM_THM_JUMP24
))
3681 if (branch_type
== ST_BRANCH_TO_THUMB
)
3683 /* Thumb to thumb. */
3686 stub_type
= (info
->shared
| globals
->pic_veneer
)
3688 ? ((globals
->use_blx
3689 && (r_type
== R_ARM_THM_CALL
))
3690 /* V5T and above. Stub starts with ARM code, so
3691 we must be able to switch mode before
3692 reaching it, which is only possible for 'bl'
3693 (ie R_ARM_THM_CALL relocation). */
3694 ? arm_stub_long_branch_any_thumb_pic
3695 /* On V4T, use Thumb code only. */
3696 : arm_stub_long_branch_v4t_thumb_thumb_pic
)
3698 /* non-PIC stubs. */
3699 : ((globals
->use_blx
3700 && (r_type
== R_ARM_THM_CALL
))
3701 /* V5T and above. */
3702 ? arm_stub_long_branch_any_any
3704 : arm_stub_long_branch_v4t_thumb_thumb
);
3708 stub_type
= (info
->shared
| globals
->pic_veneer
)
3710 ? arm_stub_long_branch_thumb_only_pic
3712 : arm_stub_long_branch_thumb_only
;
3719 && sym_sec
->owner
!= NULL
3720 && !INTERWORK_FLAG (sym_sec
->owner
))
3722 (*_bfd_error_handler
)
3723 (_("%B(%s): warning: interworking not enabled.\n"
3724 " first occurrence: %B: Thumb call to ARM"),
3725 sym_sec
->owner
, input_bfd
, name
);
3729 (info
->shared
| globals
->pic_veneer
)
3731 ? (r_type
== R_ARM_THM_TLS_CALL
3733 ? (globals
->use_blx
? arm_stub_long_branch_any_tls_pic
3734 : arm_stub_long_branch_v4t_thumb_tls_pic
)
3735 : ((globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
3736 /* V5T PIC and above. */
3737 ? arm_stub_long_branch_any_arm_pic
3739 : arm_stub_long_branch_v4t_thumb_arm_pic
))
3741 /* non-PIC stubs. */
3742 : ((globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
3743 /* V5T and above. */
3744 ? arm_stub_long_branch_any_any
3746 : arm_stub_long_branch_v4t_thumb_arm
);
3748 /* Handle v4t short branches. */
3749 if ((stub_type
== arm_stub_long_branch_v4t_thumb_arm
)
3750 && (branch_offset
<= THM_MAX_FWD_BRANCH_OFFSET
)
3751 && (branch_offset
>= THM_MAX_BWD_BRANCH_OFFSET
))
3752 stub_type
= arm_stub_short_branch_v4t_thumb_arm
;
3756 else if (r_type
== R_ARM_CALL
3757 || r_type
== R_ARM_JUMP24
3758 || r_type
== R_ARM_PLT32
3759 || r_type
== R_ARM_TLS_CALL
)
3761 if (branch_type
== ST_BRANCH_TO_THUMB
)
3766 && sym_sec
->owner
!= NULL
3767 && !INTERWORK_FLAG (sym_sec
->owner
))
3769 (*_bfd_error_handler
)
3770 (_("%B(%s): warning: interworking not enabled.\n"
3771 " first occurrence: %B: ARM call to Thumb"),
3772 sym_sec
->owner
, input_bfd
, name
);
3775 /* We have an extra 2-bytes reach because of
3776 the mode change (bit 24 (H) of BLX encoding). */
3777 if (branch_offset
> (ARM_MAX_FWD_BRANCH_OFFSET
+ 2)
3778 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
)
3779 || (r_type
== R_ARM_CALL
&& !globals
->use_blx
)
3780 || (r_type
== R_ARM_JUMP24
)
3781 || (r_type
== R_ARM_PLT32
))
3783 stub_type
= (info
->shared
| globals
->pic_veneer
)
3785 ? ((globals
->use_blx
)
3786 /* V5T and above. */
3787 ? arm_stub_long_branch_any_thumb_pic
3789 : arm_stub_long_branch_v4t_arm_thumb_pic
)
3791 /* non-PIC stubs. */
3792 : ((globals
->use_blx
)
3793 /* V5T and above. */
3794 ? arm_stub_long_branch_any_any
3796 : arm_stub_long_branch_v4t_arm_thumb
);
3802 if (branch_offset
> ARM_MAX_FWD_BRANCH_OFFSET
3803 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
))
3806 (info
->shared
| globals
->pic_veneer
)
3808 ? (r_type
== R_ARM_TLS_CALL
3810 ? arm_stub_long_branch_any_tls_pic
3811 : arm_stub_long_branch_any_arm_pic
)
3812 /* non-PIC stubs. */
3813 : arm_stub_long_branch_any_any
;
3818 /* If a stub is needed, record the actual destination type. */
3819 if (stub_type
!= arm_stub_none
)
3820 *actual_branch_type
= branch_type
;
3825 /* Build a name for an entry in the stub hash table. */
3828 elf32_arm_stub_name (const asection
*input_section
,
3829 const asection
*sym_sec
,
3830 const struct elf32_arm_link_hash_entry
*hash
,
3831 const Elf_Internal_Rela
*rel
,
3832 enum elf32_arm_stub_type stub_type
)
3839 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 8 + 1 + 2 + 1;
3840 stub_name
= (char *) bfd_malloc (len
);
3841 if (stub_name
!= NULL
)
3842 sprintf (stub_name
, "%08x_%s+%x_%d",
3843 input_section
->id
& 0xffffffff,
3844 hash
->root
.root
.root
.string
,
3845 (int) rel
->r_addend
& 0xffffffff,
3850 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
3851 stub_name
= (char *) bfd_malloc (len
);
3852 if (stub_name
!= NULL
)
3853 sprintf (stub_name
, "%08x_%x:%x+%x_%d",
3854 input_section
->id
& 0xffffffff,
3855 sym_sec
->id
& 0xffffffff,
3856 ELF32_R_TYPE (rel
->r_info
) == R_ARM_TLS_CALL
3857 || ELF32_R_TYPE (rel
->r_info
) == R_ARM_THM_TLS_CALL
3858 ? 0 : (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
3859 (int) rel
->r_addend
& 0xffffffff,
3866 /* Look up an entry in the stub hash. Stub entries are cached because
3867 creating the stub name takes a bit of time. */
3869 static struct elf32_arm_stub_hash_entry
*
3870 elf32_arm_get_stub_entry (const asection
*input_section
,
3871 const asection
*sym_sec
,
3872 struct elf_link_hash_entry
*hash
,
3873 const Elf_Internal_Rela
*rel
,
3874 struct elf32_arm_link_hash_table
*htab
,
3875 enum elf32_arm_stub_type stub_type
)
3877 struct elf32_arm_stub_hash_entry
*stub_entry
;
3878 struct elf32_arm_link_hash_entry
*h
= (struct elf32_arm_link_hash_entry
*) hash
;
3879 const asection
*id_sec
;
3881 if ((input_section
->flags
& SEC_CODE
) == 0)
3884 /* If this input section is part of a group of sections sharing one
3885 stub section, then use the id of the first section in the group.
3886 Stub names need to include a section id, as there may well be
3887 more than one stub used to reach say, printf, and we need to
3888 distinguish between them. */
3889 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
3891 if (h
!= NULL
&& h
->stub_cache
!= NULL
3892 && h
->stub_cache
->h
== h
3893 && h
->stub_cache
->id_sec
== id_sec
3894 && h
->stub_cache
->stub_type
== stub_type
)
3896 stub_entry
= h
->stub_cache
;
3902 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, h
, rel
, stub_type
);
3903 if (stub_name
== NULL
)
3906 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
,
3907 stub_name
, FALSE
, FALSE
);
3909 h
->stub_cache
= stub_entry
;
3917 /* Find or create a stub section. Returns a pointer to the stub section, and
3918 the section to which the stub section will be attached (in *LINK_SEC_P).
3919 LINK_SEC_P may be NULL. */
3922 elf32_arm_create_or_find_stub_sec (asection
**link_sec_p
, asection
*section
,
3923 struct elf32_arm_link_hash_table
*htab
)
3928 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3929 BFD_ASSERT (link_sec
!= NULL
);
3930 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
3932 if (stub_sec
== NULL
)
3934 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
3935 if (stub_sec
== NULL
)
3941 namelen
= strlen (link_sec
->name
);
3942 len
= namelen
+ sizeof (STUB_SUFFIX
);
3943 s_name
= (char *) bfd_alloc (htab
->stub_bfd
, len
);
3947 memcpy (s_name
, link_sec
->name
, namelen
);
3948 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
3949 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
3950 if (stub_sec
== NULL
)
3952 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
3954 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
3958 *link_sec_p
= link_sec
;
3963 /* Add a new stub entry to the stub hash. Not all fields of the new
3964 stub entry are initialised. */
3966 static struct elf32_arm_stub_hash_entry
*
3967 elf32_arm_add_stub (const char *stub_name
,
3969 struct elf32_arm_link_hash_table
*htab
)
3973 struct elf32_arm_stub_hash_entry
*stub_entry
;
3975 stub_sec
= elf32_arm_create_or_find_stub_sec (&link_sec
, section
, htab
);
3976 if (stub_sec
== NULL
)
3979 /* Enter this entry into the linker stub hash table. */
3980 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3982 if (stub_entry
== NULL
)
3984 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
3990 stub_entry
->stub_sec
= stub_sec
;
3991 stub_entry
->stub_offset
= 0;
3992 stub_entry
->id_sec
= link_sec
;
3997 /* Store an Arm insn into an output section not processed by
3998 elf32_arm_write_section. */
4001 put_arm_insn (struct elf32_arm_link_hash_table
* htab
,
4002 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
4004 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
4005 bfd_putl32 (val
, ptr
);
4007 bfd_putb32 (val
, ptr
);
4010 /* Store a 16-bit Thumb insn into an output section not processed by
4011 elf32_arm_write_section. */
4014 put_thumb_insn (struct elf32_arm_link_hash_table
* htab
,
4015 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
4017 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
4018 bfd_putl16 (val
, ptr
);
4020 bfd_putb16 (val
, ptr
);
4023 /* If it's possible to change R_TYPE to a more efficient access
4024 model, return the new reloc type. */
4027 elf32_arm_tls_transition (struct bfd_link_info
*info
, int r_type
,
4028 struct elf_link_hash_entry
*h
)
4030 int is_local
= (h
== NULL
);
4032 if (info
->shared
|| (h
&& h
->root
.type
== bfd_link_hash_undefweak
))
4035 /* We do not support relaxations for Old TLS models. */
4038 case R_ARM_TLS_GOTDESC
:
4039 case R_ARM_TLS_CALL
:
4040 case R_ARM_THM_TLS_CALL
:
4041 case R_ARM_TLS_DESCSEQ
:
4042 case R_ARM_THM_TLS_DESCSEQ
:
4043 return is_local
? R_ARM_TLS_LE32
: R_ARM_TLS_IE32
;
4049 static bfd_reloc_status_type elf32_arm_final_link_relocate
4050 (reloc_howto_type
*, bfd
*, bfd
*, asection
*, bfd_byte
*,
4051 Elf_Internal_Rela
*, bfd_vma
, struct bfd_link_info
*, asection
*,
4052 const char *, unsigned char, enum arm_st_branch_type
,
4053 struct elf_link_hash_entry
*, bfd_boolean
*, char **);
4056 arm_stub_required_alignment (enum elf32_arm_stub_type stub_type
)
4060 case arm_stub_a8_veneer_b_cond
:
4061 case arm_stub_a8_veneer_b
:
4062 case arm_stub_a8_veneer_bl
:
4065 case arm_stub_long_branch_any_any
:
4066 case arm_stub_long_branch_v4t_arm_thumb
:
4067 case arm_stub_long_branch_thumb_only
:
4068 case arm_stub_long_branch_v4t_thumb_thumb
:
4069 case arm_stub_long_branch_v4t_thumb_arm
:
4070 case arm_stub_short_branch_v4t_thumb_arm
:
4071 case arm_stub_long_branch_any_arm_pic
:
4072 case arm_stub_long_branch_any_thumb_pic
:
4073 case arm_stub_long_branch_v4t_thumb_thumb_pic
:
4074 case arm_stub_long_branch_v4t_arm_thumb_pic
:
4075 case arm_stub_long_branch_v4t_thumb_arm_pic
:
4076 case arm_stub_long_branch_thumb_only_pic
:
4077 case arm_stub_long_branch_any_tls_pic
:
4078 case arm_stub_long_branch_v4t_thumb_tls_pic
:
4079 case arm_stub_a8_veneer_blx
:
4083 abort (); /* Should be unreachable. */
4088 arm_build_one_stub (struct bfd_hash_entry
*gen_entry
,
4092 struct elf32_arm_stub_hash_entry
*stub_entry
;
4093 struct elf32_arm_link_hash_table
*globals
;
4094 struct bfd_link_info
*info
;
4101 const insn_sequence
*template_sequence
;
4103 int stub_reloc_idx
[MAXRELOCS
] = {-1, -1};
4104 int stub_reloc_offset
[MAXRELOCS
] = {0, 0};
4107 /* Massage our args to the form they really have. */
4108 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
4109 info
= (struct bfd_link_info
*) in_arg
;
4111 globals
= elf32_arm_hash_table (info
);
4112 if (globals
== NULL
)
4115 stub_sec
= stub_entry
->stub_sec
;
4117 if ((globals
->fix_cortex_a8
< 0)
4118 != (arm_stub_required_alignment (stub_entry
->stub_type
) == 2))
4119 /* We have to do less-strictly-aligned fixes last. */
4122 /* Make a note of the offset within the stubs for this entry. */
4123 stub_entry
->stub_offset
= stub_sec
->size
;
4124 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
4126 stub_bfd
= stub_sec
->owner
;
4128 /* This is the address of the stub destination. */
4129 sym_value
= (stub_entry
->target_value
4130 + stub_entry
->target_section
->output_offset
4131 + stub_entry
->target_section
->output_section
->vma
);
4133 template_sequence
= stub_entry
->stub_template
;
4134 template_size
= stub_entry
->stub_template_size
;
4137 for (i
= 0; i
< template_size
; i
++)
4139 switch (template_sequence
[i
].type
)
4143 bfd_vma data
= (bfd_vma
) template_sequence
[i
].data
;
4144 if (template_sequence
[i
].reloc_addend
!= 0)
4146 /* We've borrowed the reloc_addend field to mean we should
4147 insert a condition code into this (Thumb-1 branch)
4148 instruction. See THUMB16_BCOND_INSN. */
4149 BFD_ASSERT ((data
& 0xff00) == 0xd000);
4150 data
|= ((stub_entry
->orig_insn
>> 22) & 0xf) << 8;
4152 bfd_put_16 (stub_bfd
, data
, loc
+ size
);
4158 bfd_put_16 (stub_bfd
,
4159 (template_sequence
[i
].data
>> 16) & 0xffff,
4161 bfd_put_16 (stub_bfd
, template_sequence
[i
].data
& 0xffff,
4163 if (template_sequence
[i
].r_type
!= R_ARM_NONE
)
4165 stub_reloc_idx
[nrelocs
] = i
;
4166 stub_reloc_offset
[nrelocs
++] = size
;
4172 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
,
4174 /* Handle cases where the target is encoded within the
4176 if (template_sequence
[i
].r_type
== R_ARM_JUMP24
)
4178 stub_reloc_idx
[nrelocs
] = i
;
4179 stub_reloc_offset
[nrelocs
++] = size
;
4185 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
, loc
+ size
);
4186 stub_reloc_idx
[nrelocs
] = i
;
4187 stub_reloc_offset
[nrelocs
++] = size
;
4197 stub_sec
->size
+= size
;
4199 /* Stub size has already been computed in arm_size_one_stub. Check
4201 BFD_ASSERT (size
== stub_entry
->stub_size
);
4203 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
4204 if (stub_entry
->branch_type
== ST_BRANCH_TO_THUMB
)
4207 /* Assume there is at least one and at most MAXRELOCS entries to relocate
4209 BFD_ASSERT (nrelocs
!= 0 && nrelocs
<= MAXRELOCS
);
4211 for (i
= 0; i
< nrelocs
; i
++)
4212 if (template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP24
4213 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP19
4214 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_CALL
4215 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_XPC22
)
4217 Elf_Internal_Rela rel
;
4218 bfd_boolean unresolved_reloc
;
4219 char *error_message
;
4220 enum arm_st_branch_type branch_type
4221 = (template_sequence
[stub_reloc_idx
[i
]].r_type
!= R_ARM_THM_XPC22
4222 ? ST_BRANCH_TO_THUMB
: ST_BRANCH_TO_ARM
);
4223 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
;
4225 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
4226 rel
.r_info
= ELF32_R_INFO (0,
4227 template_sequence
[stub_reloc_idx
[i
]].r_type
);
4228 rel
.r_addend
= template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
4230 if (stub_entry
->stub_type
== arm_stub_a8_veneer_b_cond
&& i
== 0)
4231 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
4232 template should refer back to the instruction after the original
4234 points_to
= sym_value
;
4236 /* There may be unintended consequences if this is not true. */
4237 BFD_ASSERT (stub_entry
->h
== NULL
);
4239 /* Note: _bfd_final_link_relocate doesn't handle these relocations
4240 properly. We should probably use this function unconditionally,
4241 rather than only for certain relocations listed in the enclosing
4242 conditional, for the sake of consistency. */
4243 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4244 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
4245 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
4246 points_to
, info
, stub_entry
->target_section
, "", STT_FUNC
,
4247 branch_type
, (struct elf_link_hash_entry
*) stub_entry
->h
,
4248 &unresolved_reloc
, &error_message
);
4252 Elf_Internal_Rela rel
;
4253 bfd_boolean unresolved_reloc
;
4254 char *error_message
;
4255 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
4256 + template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
4258 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
4259 rel
.r_info
= ELF32_R_INFO (0,
4260 template_sequence
[stub_reloc_idx
[i
]].r_type
);
4263 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4264 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
4265 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
4266 points_to
, info
, stub_entry
->target_section
, "", STT_FUNC
,
4267 stub_entry
->branch_type
,
4268 (struct elf_link_hash_entry
*) stub_entry
->h
, &unresolved_reloc
,
4276 /* Calculate the template, template size and instruction size for a stub.
4277 Return value is the instruction size. */
4280 find_stub_size_and_template (enum elf32_arm_stub_type stub_type
,
4281 const insn_sequence
**stub_template
,
4282 int *stub_template_size
)
4284 const insn_sequence
*template_sequence
= NULL
;
4285 int template_size
= 0, i
;
4288 template_sequence
= stub_definitions
[stub_type
].template_sequence
;
4290 *stub_template
= template_sequence
;
4292 template_size
= stub_definitions
[stub_type
].template_size
;
4293 if (stub_template_size
)
4294 *stub_template_size
= template_size
;
4297 for (i
= 0; i
< template_size
; i
++)
4299 switch (template_sequence
[i
].type
)
4320 /* As above, but don't actually build the stub. Just bump offset so
4321 we know stub section sizes. */
4324 arm_size_one_stub (struct bfd_hash_entry
*gen_entry
,
4325 void *in_arg ATTRIBUTE_UNUSED
)
4327 struct elf32_arm_stub_hash_entry
*stub_entry
;
4328 const insn_sequence
*template_sequence
;
4329 int template_size
, size
;
4331 /* Massage our args to the form they really have. */
4332 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
4334 BFD_ASSERT((stub_entry
->stub_type
> arm_stub_none
)
4335 && stub_entry
->stub_type
< ARRAY_SIZE(stub_definitions
));
4337 size
= find_stub_size_and_template (stub_entry
->stub_type
, &template_sequence
,
4340 stub_entry
->stub_size
= size
;
4341 stub_entry
->stub_template
= template_sequence
;
4342 stub_entry
->stub_template_size
= template_size
;
4344 size
= (size
+ 7) & ~7;
4345 stub_entry
->stub_sec
->size
+= size
;
4350 /* External entry points for sizing and building linker stubs. */
4352 /* Set up various things so that we can make a list of input sections
4353 for each output section included in the link. Returns -1 on error,
4354 0 when no stubs will be needed, and 1 on success. */
4357 elf32_arm_setup_section_lists (bfd
*output_bfd
,
4358 struct bfd_link_info
*info
)
4361 unsigned int bfd_count
;
4362 int top_id
, top_index
;
4364 asection
**input_list
, **list
;
4366 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4370 if (! is_elf_hash_table (htab
))
4373 /* Count the number of input BFDs and find the top input section id. */
4374 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
4376 input_bfd
= input_bfd
->link_next
)
4379 for (section
= input_bfd
->sections
;
4381 section
= section
->next
)
4383 if (top_id
< section
->id
)
4384 top_id
= section
->id
;
4387 htab
->bfd_count
= bfd_count
;
4389 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
4390 htab
->stub_group
= (struct map_stub
*) bfd_zmalloc (amt
);
4391 if (htab
->stub_group
== NULL
)
4393 htab
->top_id
= top_id
;
4395 /* We can't use output_bfd->section_count here to find the top output
4396 section index as some sections may have been removed, and
4397 _bfd_strip_section_from_output doesn't renumber the indices. */
4398 for (section
= output_bfd
->sections
, top_index
= 0;
4400 section
= section
->next
)
4402 if (top_index
< section
->index
)
4403 top_index
= section
->index
;
4406 htab
->top_index
= top_index
;
4407 amt
= sizeof (asection
*) * (top_index
+ 1);
4408 input_list
= (asection
**) bfd_malloc (amt
);
4409 htab
->input_list
= input_list
;
4410 if (input_list
== NULL
)
4413 /* For sections we aren't interested in, mark their entries with a
4414 value we can check later. */
4415 list
= input_list
+ top_index
;
4417 *list
= bfd_abs_section_ptr
;
4418 while (list
-- != input_list
);
4420 for (section
= output_bfd
->sections
;
4422 section
= section
->next
)
4424 if ((section
->flags
& SEC_CODE
) != 0)
4425 input_list
[section
->index
] = NULL
;
4431 /* The linker repeatedly calls this function for each input section,
4432 in the order that input sections are linked into output sections.
4433 Build lists of input sections to determine groupings between which
4434 we may insert linker stubs. */
4437 elf32_arm_next_input_section (struct bfd_link_info
*info
,
4440 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4445 if (isec
->output_section
->index
<= htab
->top_index
)
4447 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
4449 if (*list
!= bfd_abs_section_ptr
&& (isec
->flags
& SEC_CODE
) != 0)
4451 /* Steal the link_sec pointer for our list. */
4452 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4453 /* This happens to make the list in reverse order,
4454 which we reverse later. */
4455 PREV_SEC (isec
) = *list
;
4461 /* See whether we can group stub sections together. Grouping stub
4462 sections may result in fewer stubs. More importantly, we need to
4463 put all .init* and .fini* stubs at the end of the .init or
4464 .fini output sections respectively, because glibc splits the
4465 _init and _fini functions into multiple parts. Putting a stub in
4466 the middle of a function is not a good idea. */
4469 group_sections (struct elf32_arm_link_hash_table
*htab
,
4470 bfd_size_type stub_group_size
,
4471 bfd_boolean stubs_always_after_branch
)
4473 asection
**list
= htab
->input_list
;
4477 asection
*tail
= *list
;
4480 if (tail
== bfd_abs_section_ptr
)
4483 /* Reverse the list: we must avoid placing stubs at the
4484 beginning of the section because the beginning of the text
4485 section may be required for an interrupt vector in bare metal
4487 #define NEXT_SEC PREV_SEC
4489 while (tail
!= NULL
)
4491 /* Pop from tail. */
4492 asection
*item
= tail
;
4493 tail
= PREV_SEC (item
);
4496 NEXT_SEC (item
) = head
;
4500 while (head
!= NULL
)
4504 bfd_vma stub_group_start
= head
->output_offset
;
4505 bfd_vma end_of_next
;
4508 while (NEXT_SEC (curr
) != NULL
)
4510 next
= NEXT_SEC (curr
);
4511 end_of_next
= next
->output_offset
+ next
->size
;
4512 if (end_of_next
- stub_group_start
>= stub_group_size
)
4513 /* End of NEXT is too far from start, so stop. */
4515 /* Add NEXT to the group. */
4519 /* OK, the size from the start to the start of CURR is less
4520 than stub_group_size and thus can be handled by one stub
4521 section. (Or the head section is itself larger than
4522 stub_group_size, in which case we may be toast.)
4523 We should really be keeping track of the total size of
4524 stubs added here, as stubs contribute to the final output
4528 next
= NEXT_SEC (head
);
4529 /* Set up this stub group. */
4530 htab
->stub_group
[head
->id
].link_sec
= curr
;
4532 while (head
!= curr
&& (head
= next
) != NULL
);
4534 /* But wait, there's more! Input sections up to stub_group_size
4535 bytes after the stub section can be handled by it too. */
4536 if (!stubs_always_after_branch
)
4538 stub_group_start
= curr
->output_offset
+ curr
->size
;
4540 while (next
!= NULL
)
4542 end_of_next
= next
->output_offset
+ next
->size
;
4543 if (end_of_next
- stub_group_start
>= stub_group_size
)
4544 /* End of NEXT is too far from stubs, so stop. */
4546 /* Add NEXT to the stub group. */
4548 next
= NEXT_SEC (head
);
4549 htab
->stub_group
[head
->id
].link_sec
= curr
;
4555 while (list
++ != htab
->input_list
+ htab
->top_index
);
4557 free (htab
->input_list
);
4562 /* Comparison function for sorting/searching relocations relating to Cortex-A8
4566 a8_reloc_compare (const void *a
, const void *b
)
4568 const struct a8_erratum_reloc
*ra
= (const struct a8_erratum_reloc
*) a
;
4569 const struct a8_erratum_reloc
*rb
= (const struct a8_erratum_reloc
*) b
;
4571 if (ra
->from
< rb
->from
)
4573 else if (ra
->from
> rb
->from
)
4579 static struct elf_link_hash_entry
*find_thumb_glue (struct bfd_link_info
*,
4580 const char *, char **);
4582 /* Helper function to scan code for sequences which might trigger the Cortex-A8
4583 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
4584 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
4588 cortex_a8_erratum_scan (bfd
*input_bfd
,
4589 struct bfd_link_info
*info
,
4590 struct a8_erratum_fix
**a8_fixes_p
,
4591 unsigned int *num_a8_fixes_p
,
4592 unsigned int *a8_fix_table_size_p
,
4593 struct a8_erratum_reloc
*a8_relocs
,
4594 unsigned int num_a8_relocs
,
4595 unsigned prev_num_a8_fixes
,
4596 bfd_boolean
*stub_changed_p
)
4599 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4600 struct a8_erratum_fix
*a8_fixes
= *a8_fixes_p
;
4601 unsigned int num_a8_fixes
= *num_a8_fixes_p
;
4602 unsigned int a8_fix_table_size
= *a8_fix_table_size_p
;
4607 for (section
= input_bfd
->sections
;
4609 section
= section
->next
)
4611 bfd_byte
*contents
= NULL
;
4612 struct _arm_elf_section_data
*sec_data
;
4616 if (elf_section_type (section
) != SHT_PROGBITS
4617 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
4618 || (section
->flags
& SEC_EXCLUDE
) != 0
4619 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
4620 || (section
->output_section
== bfd_abs_section_ptr
))
4623 base_vma
= section
->output_section
->vma
+ section
->output_offset
;
4625 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
4626 contents
= elf_section_data (section
)->this_hdr
.contents
;
4627 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
4630 sec_data
= elf32_arm_section_data (section
);
4632 for (span
= 0; span
< sec_data
->mapcount
; span
++)
4634 unsigned int span_start
= sec_data
->map
[span
].vma
;
4635 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
4636 ? section
->size
: sec_data
->map
[span
+ 1].vma
;
4638 char span_type
= sec_data
->map
[span
].type
;
4639 bfd_boolean last_was_32bit
= FALSE
, last_was_branch
= FALSE
;
4641 if (span_type
!= 't')
4644 /* Span is entirely within a single 4KB region: skip scanning. */
4645 if (((base_vma
+ span_start
) & ~0xfff)
4646 == ((base_vma
+ span_end
) & ~0xfff))
4649 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
4651 * The opcode is BLX.W, BL.W, B.W, Bcc.W
4652 * The branch target is in the same 4KB region as the
4653 first half of the branch.
4654 * The instruction before the branch is a 32-bit
4655 length non-branch instruction. */
4656 for (i
= span_start
; i
< span_end
;)
4658 unsigned int insn
= bfd_getl16 (&contents
[i
]);
4659 bfd_boolean insn_32bit
= FALSE
, is_blx
= FALSE
, is_b
= FALSE
;
4660 bfd_boolean is_bl
= FALSE
, is_bcc
= FALSE
, is_32bit_branch
;
4662 if ((insn
& 0xe000) == 0xe000 && (insn
& 0x1800) != 0x0000)
4667 /* Load the rest of the insn (in manual-friendly order). */
4668 insn
= (insn
<< 16) | bfd_getl16 (&contents
[i
+ 2]);
4670 /* Encoding T4: B<c>.W. */
4671 is_b
= (insn
& 0xf800d000) == 0xf0009000;
4672 /* Encoding T1: BL<c>.W. */
4673 is_bl
= (insn
& 0xf800d000) == 0xf000d000;
4674 /* Encoding T2: BLX<c>.W. */
4675 is_blx
= (insn
& 0xf800d000) == 0xf000c000;
4676 /* Encoding T3: B<c>.W (not permitted in IT block). */
4677 is_bcc
= (insn
& 0xf800d000) == 0xf0008000
4678 && (insn
& 0x07f00000) != 0x03800000;
4681 is_32bit_branch
= is_b
|| is_bl
|| is_blx
|| is_bcc
;
4683 if (((base_vma
+ i
) & 0xfff) == 0xffe
4687 && ! last_was_branch
)
4689 bfd_signed_vma offset
= 0;
4690 bfd_boolean force_target_arm
= FALSE
;
4691 bfd_boolean force_target_thumb
= FALSE
;
4693 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
4694 struct a8_erratum_reloc key
, *found
;
4695 bfd_boolean use_plt
= FALSE
;
4697 key
.from
= base_vma
+ i
;
4698 found
= (struct a8_erratum_reloc
*)
4699 bsearch (&key
, a8_relocs
, num_a8_relocs
,
4700 sizeof (struct a8_erratum_reloc
),
4705 char *error_message
= NULL
;
4706 struct elf_link_hash_entry
*entry
;
4708 /* We don't care about the error returned from this
4709 function, only if there is glue or not. */
4710 entry
= find_thumb_glue (info
, found
->sym_name
,
4714 found
->non_a8_stub
= TRUE
;
4716 /* Keep a simpler condition, for the sake of clarity. */
4717 if (htab
->root
.splt
!= NULL
&& found
->hash
!= NULL
4718 && found
->hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4721 if (found
->r_type
== R_ARM_THM_CALL
)
4723 if (found
->branch_type
== ST_BRANCH_TO_ARM
4725 force_target_arm
= TRUE
;
4727 force_target_thumb
= TRUE
;
4731 /* Check if we have an offending branch instruction. */
4733 if (found
&& found
->non_a8_stub
)
4734 /* We've already made a stub for this instruction, e.g.
4735 it's a long branch or a Thumb->ARM stub. Assume that
4736 stub will suffice to work around the A8 erratum (see
4737 setting of always_after_branch above). */
4741 offset
= (insn
& 0x7ff) << 1;
4742 offset
|= (insn
& 0x3f0000) >> 4;
4743 offset
|= (insn
& 0x2000) ? 0x40000 : 0;
4744 offset
|= (insn
& 0x800) ? 0x80000 : 0;
4745 offset
|= (insn
& 0x4000000) ? 0x100000 : 0;
4746 if (offset
& 0x100000)
4747 offset
|= ~ ((bfd_signed_vma
) 0xfffff);
4748 stub_type
= arm_stub_a8_veneer_b_cond
;
4750 else if (is_b
|| is_bl
|| is_blx
)
4752 int s
= (insn
& 0x4000000) != 0;
4753 int j1
= (insn
& 0x2000) != 0;
4754 int j2
= (insn
& 0x800) != 0;
4758 offset
= (insn
& 0x7ff) << 1;
4759 offset
|= (insn
& 0x3ff0000) >> 4;
4763 if (offset
& 0x1000000)
4764 offset
|= ~ ((bfd_signed_vma
) 0xffffff);
4767 offset
&= ~ ((bfd_signed_vma
) 3);
4769 stub_type
= is_blx
? arm_stub_a8_veneer_blx
:
4770 is_bl
? arm_stub_a8_veneer_bl
: arm_stub_a8_veneer_b
;
4773 if (stub_type
!= arm_stub_none
)
4775 bfd_vma pc_for_insn
= base_vma
+ i
+ 4;
4777 /* The original instruction is a BL, but the target is
4778 an ARM instruction. If we were not making a stub,
4779 the BL would have been converted to a BLX. Use the
4780 BLX stub instead in that case. */
4781 if (htab
->use_blx
&& force_target_arm
4782 && stub_type
== arm_stub_a8_veneer_bl
)
4784 stub_type
= arm_stub_a8_veneer_blx
;
4788 /* Conversely, if the original instruction was
4789 BLX but the target is Thumb mode, use the BL
4791 else if (force_target_thumb
4792 && stub_type
== arm_stub_a8_veneer_blx
)
4794 stub_type
= arm_stub_a8_veneer_bl
;
4800 pc_for_insn
&= ~ ((bfd_vma
) 3);
4802 /* If we found a relocation, use the proper destination,
4803 not the offset in the (unrelocated) instruction.
4804 Note this is always done if we switched the stub type
4808 (bfd_signed_vma
) (found
->destination
- pc_for_insn
);
4810 /* If the stub will use a Thumb-mode branch to a
4811 PLT target, redirect it to the preceding Thumb
4813 if (stub_type
!= arm_stub_a8_veneer_blx
&& use_plt
)
4814 offset
-= PLT_THUMB_STUB_SIZE
;
4816 target
= pc_for_insn
+ offset
;
4818 /* The BLX stub is ARM-mode code. Adjust the offset to
4819 take the different PC value (+8 instead of +4) into
4821 if (stub_type
== arm_stub_a8_veneer_blx
)
4824 if (((base_vma
+ i
) & ~0xfff) == (target
& ~0xfff))
4826 char *stub_name
= NULL
;
4828 if (num_a8_fixes
== a8_fix_table_size
)
4830 a8_fix_table_size
*= 2;
4831 a8_fixes
= (struct a8_erratum_fix
*)
4832 bfd_realloc (a8_fixes
,
4833 sizeof (struct a8_erratum_fix
)
4834 * a8_fix_table_size
);
4837 if (num_a8_fixes
< prev_num_a8_fixes
)
4839 /* If we're doing a subsequent scan,
4840 check if we've found the same fix as
4841 before, and try and reuse the stub
4843 stub_name
= a8_fixes
[num_a8_fixes
].stub_name
;
4844 if ((a8_fixes
[num_a8_fixes
].section
!= section
)
4845 || (a8_fixes
[num_a8_fixes
].offset
!= i
))
4849 *stub_changed_p
= TRUE
;
4855 stub_name
= (char *) bfd_malloc (8 + 1 + 8 + 1);
4856 if (stub_name
!= NULL
)
4857 sprintf (stub_name
, "%x:%x", section
->id
, i
);
4860 a8_fixes
[num_a8_fixes
].input_bfd
= input_bfd
;
4861 a8_fixes
[num_a8_fixes
].section
= section
;
4862 a8_fixes
[num_a8_fixes
].offset
= i
;
4863 a8_fixes
[num_a8_fixes
].addend
= offset
;
4864 a8_fixes
[num_a8_fixes
].orig_insn
= insn
;
4865 a8_fixes
[num_a8_fixes
].stub_name
= stub_name
;
4866 a8_fixes
[num_a8_fixes
].stub_type
= stub_type
;
4867 a8_fixes
[num_a8_fixes
].branch_type
=
4868 is_blx
? ST_BRANCH_TO_ARM
: ST_BRANCH_TO_THUMB
;
4875 i
+= insn_32bit
? 4 : 2;
4876 last_was_32bit
= insn_32bit
;
4877 last_was_branch
= is_32bit_branch
;
4881 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
4885 *a8_fixes_p
= a8_fixes
;
4886 *num_a8_fixes_p
= num_a8_fixes
;
4887 *a8_fix_table_size_p
= a8_fix_table_size
;
4892 /* Determine and set the size of the stub section for a final link.
4894 The basic idea here is to examine all the relocations looking for
4895 PC-relative calls to a target that is unreachable with a "bl"
4899 elf32_arm_size_stubs (bfd
*output_bfd
,
4901 struct bfd_link_info
*info
,
4902 bfd_signed_vma group_size
,
4903 asection
* (*add_stub_section
) (const char *, asection
*),
4904 void (*layout_sections_again
) (void))
4906 bfd_size_type stub_group_size
;
4907 bfd_boolean stubs_always_after_branch
;
4908 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4909 struct a8_erratum_fix
*a8_fixes
= NULL
;
4910 unsigned int num_a8_fixes
= 0, a8_fix_table_size
= 10;
4911 struct a8_erratum_reloc
*a8_relocs
= NULL
;
4912 unsigned int num_a8_relocs
= 0, a8_reloc_table_size
= 10, i
;
4917 if (htab
->fix_cortex_a8
)
4919 a8_fixes
= (struct a8_erratum_fix
*)
4920 bfd_zmalloc (sizeof (struct a8_erratum_fix
) * a8_fix_table_size
);
4921 a8_relocs
= (struct a8_erratum_reloc
*)
4922 bfd_zmalloc (sizeof (struct a8_erratum_reloc
) * a8_reloc_table_size
);
4925 /* Propagate mach to stub bfd, because it may not have been
4926 finalized when we created stub_bfd. */
4927 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
4928 bfd_get_mach (output_bfd
));
4930 /* Stash our params away. */
4931 htab
->stub_bfd
= stub_bfd
;
4932 htab
->add_stub_section
= add_stub_section
;
4933 htab
->layout_sections_again
= layout_sections_again
;
4934 stubs_always_after_branch
= group_size
< 0;
4936 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
4937 as the first half of a 32-bit branch straddling two 4K pages. This is a
4938 crude way of enforcing that. */
4939 if (htab
->fix_cortex_a8
)
4940 stubs_always_after_branch
= 1;
4943 stub_group_size
= -group_size
;
4945 stub_group_size
= group_size
;
4947 if (stub_group_size
== 1)
4949 /* Default values. */
4950 /* Thumb branch range is +-4MB has to be used as the default
4951 maximum size (a given section can contain both ARM and Thumb
4952 code, so the worst case has to be taken into account).
4954 This value is 24K less than that, which allows for 2025
4955 12-byte stubs. If we exceed that, then we will fail to link.
4956 The user will have to relink with an explicit group size
4958 stub_group_size
= 4170000;
4961 group_sections (htab
, stub_group_size
, stubs_always_after_branch
);
4963 /* If we're applying the cortex A8 fix, we need to determine the
4964 program header size now, because we cannot change it later --
4965 that could alter section placements. Notice the A8 erratum fix
4966 ends up requiring the section addresses to remain unchanged
4967 modulo the page size. That's something we cannot represent
4968 inside BFD, and we don't want to force the section alignment to
4969 be the page size. */
4970 if (htab
->fix_cortex_a8
)
4971 (*htab
->layout_sections_again
) ();
4976 unsigned int bfd_indx
;
4978 bfd_boolean stub_changed
= FALSE
;
4979 unsigned prev_num_a8_fixes
= num_a8_fixes
;
4982 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4984 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4986 Elf_Internal_Shdr
*symtab_hdr
;
4988 Elf_Internal_Sym
*local_syms
= NULL
;
4992 /* We'll need the symbol table in a second. */
4993 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4994 if (symtab_hdr
->sh_info
== 0)
4997 /* Walk over each section attached to the input bfd. */
4998 for (section
= input_bfd
->sections
;
5000 section
= section
->next
)
5002 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
5004 /* If there aren't any relocs, then there's nothing more
5006 if ((section
->flags
& SEC_RELOC
) == 0
5007 || section
->reloc_count
== 0
5008 || (section
->flags
& SEC_CODE
) == 0)
5011 /* If this section is a link-once section that will be
5012 discarded, then don't create any stubs. */
5013 if (section
->output_section
== NULL
5014 || section
->output_section
->owner
!= output_bfd
)
5017 /* Get the relocs. */
5019 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
5020 NULL
, info
->keep_memory
);
5021 if (internal_relocs
== NULL
)
5022 goto error_ret_free_local
;
5024 /* Now examine each relocation. */
5025 irela
= internal_relocs
;
5026 irelaend
= irela
+ section
->reloc_count
;
5027 for (; irela
< irelaend
; irela
++)
5029 unsigned int r_type
, r_indx
;
5030 enum elf32_arm_stub_type stub_type
;
5031 struct elf32_arm_stub_hash_entry
*stub_entry
;
5034 bfd_vma destination
;
5035 struct elf32_arm_link_hash_entry
*hash
;
5036 const char *sym_name
;
5038 const asection
*id_sec
;
5039 unsigned char st_type
;
5040 enum arm_st_branch_type branch_type
;
5041 bfd_boolean created_stub
= FALSE
;
5043 r_type
= ELF32_R_TYPE (irela
->r_info
);
5044 r_indx
= ELF32_R_SYM (irela
->r_info
);
5046 if (r_type
>= (unsigned int) R_ARM_max
)
5048 bfd_set_error (bfd_error_bad_value
);
5049 error_ret_free_internal
:
5050 if (elf_section_data (section
)->relocs
== NULL
)
5051 free (internal_relocs
);
5052 goto error_ret_free_local
;
5056 if (r_indx
>= symtab_hdr
->sh_info
)
5057 hash
= elf32_arm_hash_entry
5058 (elf_sym_hashes (input_bfd
)
5059 [r_indx
- symtab_hdr
->sh_info
]);
5061 /* Only look for stubs on branch instructions, or
5062 non-relaxed TLSCALL */
5063 if ((r_type
!= (unsigned int) R_ARM_CALL
)
5064 && (r_type
!= (unsigned int) R_ARM_THM_CALL
)
5065 && (r_type
!= (unsigned int) R_ARM_JUMP24
)
5066 && (r_type
!= (unsigned int) R_ARM_THM_JUMP19
)
5067 && (r_type
!= (unsigned int) R_ARM_THM_XPC22
)
5068 && (r_type
!= (unsigned int) R_ARM_THM_JUMP24
)
5069 && (r_type
!= (unsigned int) R_ARM_PLT32
)
5070 && !((r_type
== (unsigned int) R_ARM_TLS_CALL
5071 || r_type
== (unsigned int) R_ARM_THM_TLS_CALL
)
5072 && r_type
== elf32_arm_tls_transition
5073 (info
, r_type
, &hash
->root
)
5074 && ((hash
? hash
->tls_type
5075 : (elf32_arm_local_got_tls_type
5076 (input_bfd
)[r_indx
]))
5077 & GOT_TLS_GDESC
) != 0))
5080 /* Now determine the call target, its name, value,
5087 if (r_type
== (unsigned int) R_ARM_TLS_CALL
5088 || r_type
== (unsigned int) R_ARM_THM_TLS_CALL
)
5090 /* A non-relaxed TLS call. The target is the
5091 plt-resident trampoline and nothing to do
5093 BFD_ASSERT (htab
->tls_trampoline
> 0);
5094 sym_sec
= htab
->root
.splt
;
5095 sym_value
= htab
->tls_trampoline
;
5098 branch_type
= ST_BRANCH_TO_ARM
;
5102 /* It's a local symbol. */
5103 Elf_Internal_Sym
*sym
;
5105 if (local_syms
== NULL
)
5108 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5109 if (local_syms
== NULL
)
5111 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
5112 symtab_hdr
->sh_info
, 0,
5114 if (local_syms
== NULL
)
5115 goto error_ret_free_internal
;
5118 sym
= local_syms
+ r_indx
;
5119 if (sym
->st_shndx
== SHN_UNDEF
)
5120 sym_sec
= bfd_und_section_ptr
;
5121 else if (sym
->st_shndx
== SHN_ABS
)
5122 sym_sec
= bfd_abs_section_ptr
;
5123 else if (sym
->st_shndx
== SHN_COMMON
)
5124 sym_sec
= bfd_com_section_ptr
;
5127 bfd_section_from_elf_index (input_bfd
, sym
->st_shndx
);
5130 /* This is an undefined symbol. It can never
5134 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
5135 sym_value
= sym
->st_value
;
5136 destination
= (sym_value
+ irela
->r_addend
5137 + sym_sec
->output_offset
5138 + sym_sec
->output_section
->vma
);
5139 st_type
= ELF_ST_TYPE (sym
->st_info
);
5140 branch_type
= ARM_SYM_BRANCH_TYPE (sym
);
5142 = bfd_elf_string_from_elf_section (input_bfd
,
5143 symtab_hdr
->sh_link
,
5148 /* It's an external symbol. */
5149 while (hash
->root
.root
.type
== bfd_link_hash_indirect
5150 || hash
->root
.root
.type
== bfd_link_hash_warning
)
5151 hash
= ((struct elf32_arm_link_hash_entry
*)
5152 hash
->root
.root
.u
.i
.link
);
5154 if (hash
->root
.root
.type
== bfd_link_hash_defined
5155 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
5157 sym_sec
= hash
->root
.root
.u
.def
.section
;
5158 sym_value
= hash
->root
.root
.u
.def
.value
;
5160 struct elf32_arm_link_hash_table
*globals
=
5161 elf32_arm_hash_table (info
);
5163 /* For a destination in a shared library,
5164 use the PLT stub as target address to
5165 decide whether a branch stub is
5168 && globals
->root
.splt
!= NULL
5170 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
5172 sym_sec
= globals
->root
.splt
;
5173 sym_value
= hash
->root
.plt
.offset
;
5174 if (sym_sec
->output_section
!= NULL
)
5175 destination
= (sym_value
5176 + sym_sec
->output_offset
5177 + sym_sec
->output_section
->vma
);
5179 else if (sym_sec
->output_section
!= NULL
)
5180 destination
= (sym_value
+ irela
->r_addend
5181 + sym_sec
->output_offset
5182 + sym_sec
->output_section
->vma
);
5184 else if ((hash
->root
.root
.type
== bfd_link_hash_undefined
)
5185 || (hash
->root
.root
.type
== bfd_link_hash_undefweak
))
5187 /* For a shared library, use the PLT stub as
5188 target address to decide whether a long
5189 branch stub is needed.
5190 For absolute code, they cannot be handled. */
5191 struct elf32_arm_link_hash_table
*globals
=
5192 elf32_arm_hash_table (info
);
5195 && globals
->root
.splt
!= NULL
5197 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
5199 sym_sec
= globals
->root
.splt
;
5200 sym_value
= hash
->root
.plt
.offset
;
5201 if (sym_sec
->output_section
!= NULL
)
5202 destination
= (sym_value
5203 + sym_sec
->output_offset
5204 + sym_sec
->output_section
->vma
);
5211 bfd_set_error (bfd_error_bad_value
);
5212 goto error_ret_free_internal
;
5214 st_type
= hash
->root
.type
;
5215 branch_type
= hash
->root
.target_internal
;
5216 sym_name
= hash
->root
.root
.root
.string
;
5221 /* Determine what (if any) linker stub is needed. */
5222 stub_type
= arm_type_of_stub (info
, section
, irela
,
5223 st_type
, &branch_type
,
5224 hash
, destination
, sym_sec
,
5225 input_bfd
, sym_name
);
5226 if (stub_type
== arm_stub_none
)
5229 /* Support for grouping stub sections. */
5230 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
5232 /* Get the name of this stub. */
5233 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, hash
,
5236 goto error_ret_free_internal
;
5238 /* We've either created a stub for this reloc already,
5239 or we are about to. */
5240 created_stub
= TRUE
;
5242 stub_entry
= arm_stub_hash_lookup
5243 (&htab
->stub_hash_table
, stub_name
,
5245 if (stub_entry
!= NULL
)
5247 /* The proper stub has already been created. */
5249 stub_entry
->target_value
= sym_value
;
5253 stub_entry
= elf32_arm_add_stub (stub_name
, section
,
5255 if (stub_entry
== NULL
)
5258 goto error_ret_free_internal
;
5261 stub_entry
->target_value
= sym_value
;
5262 stub_entry
->target_section
= sym_sec
;
5263 stub_entry
->stub_type
= stub_type
;
5264 stub_entry
->h
= hash
;
5265 stub_entry
->branch_type
= branch_type
;
5267 if (sym_name
== NULL
)
5268 sym_name
= "unnamed";
5269 stub_entry
->output_name
= (char *)
5270 bfd_alloc (htab
->stub_bfd
,
5271 sizeof (THUMB2ARM_GLUE_ENTRY_NAME
)
5272 + strlen (sym_name
));
5273 if (stub_entry
->output_name
== NULL
)
5276 goto error_ret_free_internal
;
5279 /* For historical reasons, use the existing names for
5280 ARM-to-Thumb and Thumb-to-ARM stubs. */
5281 if ((r_type
== (unsigned int) R_ARM_THM_CALL
5282 || r_type
== (unsigned int) R_ARM_THM_JUMP24
)
5283 && branch_type
== ST_BRANCH_TO_ARM
)
5284 sprintf (stub_entry
->output_name
,
5285 THUMB2ARM_GLUE_ENTRY_NAME
, sym_name
);
5286 else if ((r_type
== (unsigned int) R_ARM_CALL
5287 || r_type
== (unsigned int) R_ARM_JUMP24
)
5288 && branch_type
== ST_BRANCH_TO_THUMB
)
5289 sprintf (stub_entry
->output_name
,
5290 ARM2THUMB_GLUE_ENTRY_NAME
, sym_name
);
5292 sprintf (stub_entry
->output_name
, STUB_ENTRY_NAME
,
5295 stub_changed
= TRUE
;
5299 /* Look for relocations which might trigger Cortex-A8
5301 if (htab
->fix_cortex_a8
5302 && (r_type
== (unsigned int) R_ARM_THM_JUMP24
5303 || r_type
== (unsigned int) R_ARM_THM_JUMP19
5304 || r_type
== (unsigned int) R_ARM_THM_CALL
5305 || r_type
== (unsigned int) R_ARM_THM_XPC22
))
5307 bfd_vma from
= section
->output_section
->vma
5308 + section
->output_offset
5311 if ((from
& 0xfff) == 0xffe)
5313 /* Found a candidate. Note we haven't checked the
5314 destination is within 4K here: if we do so (and
5315 don't create an entry in a8_relocs) we can't tell
5316 that a branch should have been relocated when
5318 if (num_a8_relocs
== a8_reloc_table_size
)
5320 a8_reloc_table_size
*= 2;
5321 a8_relocs
= (struct a8_erratum_reloc
*)
5322 bfd_realloc (a8_relocs
,
5323 sizeof (struct a8_erratum_reloc
)
5324 * a8_reloc_table_size
);
5327 a8_relocs
[num_a8_relocs
].from
= from
;
5328 a8_relocs
[num_a8_relocs
].destination
= destination
;
5329 a8_relocs
[num_a8_relocs
].r_type
= r_type
;
5330 a8_relocs
[num_a8_relocs
].branch_type
= branch_type
;
5331 a8_relocs
[num_a8_relocs
].sym_name
= sym_name
;
5332 a8_relocs
[num_a8_relocs
].non_a8_stub
= created_stub
;
5333 a8_relocs
[num_a8_relocs
].hash
= hash
;
5340 /* We're done with the internal relocs, free them. */
5341 if (elf_section_data (section
)->relocs
== NULL
)
5342 free (internal_relocs
);
5345 if (htab
->fix_cortex_a8
)
5347 /* Sort relocs which might apply to Cortex-A8 erratum. */
5348 qsort (a8_relocs
, num_a8_relocs
,
5349 sizeof (struct a8_erratum_reloc
),
5352 /* Scan for branches which might trigger Cortex-A8 erratum. */
5353 if (cortex_a8_erratum_scan (input_bfd
, info
, &a8_fixes
,
5354 &num_a8_fixes
, &a8_fix_table_size
,
5355 a8_relocs
, num_a8_relocs
,
5356 prev_num_a8_fixes
, &stub_changed
)
5358 goto error_ret_free_local
;
5362 if (prev_num_a8_fixes
!= num_a8_fixes
)
5363 stub_changed
= TRUE
;
5368 /* OK, we've added some stubs. Find out the new size of the
5370 for (stub_sec
= htab
->stub_bfd
->sections
;
5372 stub_sec
= stub_sec
->next
)
5374 /* Ignore non-stub sections. */
5375 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
5381 bfd_hash_traverse (&htab
->stub_hash_table
, arm_size_one_stub
, htab
);
5383 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
5384 if (htab
->fix_cortex_a8
)
5385 for (i
= 0; i
< num_a8_fixes
; i
++)
5387 stub_sec
= elf32_arm_create_or_find_stub_sec (NULL
,
5388 a8_fixes
[i
].section
, htab
);
5390 if (stub_sec
== NULL
)
5391 goto error_ret_free_local
;
5394 += find_stub_size_and_template (a8_fixes
[i
].stub_type
, NULL
,
5399 /* Ask the linker to do its stuff. */
5400 (*htab
->layout_sections_again
) ();
5403 /* Add stubs for Cortex-A8 erratum fixes now. */
5404 if (htab
->fix_cortex_a8
)
5406 for (i
= 0; i
< num_a8_fixes
; i
++)
5408 struct elf32_arm_stub_hash_entry
*stub_entry
;
5409 char *stub_name
= a8_fixes
[i
].stub_name
;
5410 asection
*section
= a8_fixes
[i
].section
;
5411 unsigned int section_id
= a8_fixes
[i
].section
->id
;
5412 asection
*link_sec
= htab
->stub_group
[section_id
].link_sec
;
5413 asection
*stub_sec
= htab
->stub_group
[section_id
].stub_sec
;
5414 const insn_sequence
*template_sequence
;
5415 int template_size
, size
= 0;
5417 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
5419 if (stub_entry
== NULL
)
5421 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
5427 stub_entry
->stub_sec
= stub_sec
;
5428 stub_entry
->stub_offset
= 0;
5429 stub_entry
->id_sec
= link_sec
;
5430 stub_entry
->stub_type
= a8_fixes
[i
].stub_type
;
5431 stub_entry
->target_section
= a8_fixes
[i
].section
;
5432 stub_entry
->target_value
= a8_fixes
[i
].offset
;
5433 stub_entry
->target_addend
= a8_fixes
[i
].addend
;
5434 stub_entry
->orig_insn
= a8_fixes
[i
].orig_insn
;
5435 stub_entry
->branch_type
= a8_fixes
[i
].branch_type
;
5437 size
= find_stub_size_and_template (a8_fixes
[i
].stub_type
,
5441 stub_entry
->stub_size
= size
;
5442 stub_entry
->stub_template
= template_sequence
;
5443 stub_entry
->stub_template_size
= template_size
;
5446 /* Stash the Cortex-A8 erratum fix array for use later in
5447 elf32_arm_write_section(). */
5448 htab
->a8_erratum_fixes
= a8_fixes
;
5449 htab
->num_a8_erratum_fixes
= num_a8_fixes
;
5453 htab
->a8_erratum_fixes
= NULL
;
5454 htab
->num_a8_erratum_fixes
= 0;
5458 error_ret_free_local
:
5462 /* Build all the stubs associated with the current output file. The
5463 stubs are kept in a hash table attached to the main linker hash
5464 table. We also set up the .plt entries for statically linked PIC
5465 functions here. This function is called via arm_elf_finish in the
5469 elf32_arm_build_stubs (struct bfd_link_info
*info
)
5472 struct bfd_hash_table
*table
;
5473 struct elf32_arm_link_hash_table
*htab
;
5475 htab
= elf32_arm_hash_table (info
);
5479 for (stub_sec
= htab
->stub_bfd
->sections
;
5481 stub_sec
= stub_sec
->next
)
5485 /* Ignore non-stub sections. */
5486 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
5489 /* Allocate memory to hold the linker stubs. */
5490 size
= stub_sec
->size
;
5491 stub_sec
->contents
= (unsigned char *) bfd_zalloc (htab
->stub_bfd
, size
);
5492 if (stub_sec
->contents
== NULL
&& size
!= 0)
5497 /* Build the stubs as directed by the stub hash table. */
5498 table
= &htab
->stub_hash_table
;
5499 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
5500 if (htab
->fix_cortex_a8
)
5502 /* Place the cortex a8 stubs last. */
5503 htab
->fix_cortex_a8
= -1;
5504 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
5510 /* Locate the Thumb encoded calling stub for NAME. */
5512 static struct elf_link_hash_entry
*
5513 find_thumb_glue (struct bfd_link_info
*link_info
,
5515 char **error_message
)
5518 struct elf_link_hash_entry
*hash
;
5519 struct elf32_arm_link_hash_table
*hash_table
;
5521 /* We need a pointer to the armelf specific hash table. */
5522 hash_table
= elf32_arm_hash_table (link_info
);
5523 if (hash_table
== NULL
)
5526 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5527 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
5529 BFD_ASSERT (tmp_name
);
5531 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
5533 hash
= elf_link_hash_lookup
5534 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5537 && asprintf (error_message
, _("unable to find THUMB glue '%s' for '%s'"),
5538 tmp_name
, name
) == -1)
5539 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
5546 /* Locate the ARM encoded calling stub for NAME. */
5548 static struct elf_link_hash_entry
*
5549 find_arm_glue (struct bfd_link_info
*link_info
,
5551 char **error_message
)
5554 struct elf_link_hash_entry
*myh
;
5555 struct elf32_arm_link_hash_table
*hash_table
;
5557 /* We need a pointer to the elfarm specific hash table. */
5558 hash_table
= elf32_arm_hash_table (link_info
);
5559 if (hash_table
== NULL
)
5562 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5563 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
5565 BFD_ASSERT (tmp_name
);
5567 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
5569 myh
= elf_link_hash_lookup
5570 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5573 && asprintf (error_message
, _("unable to find ARM glue '%s' for '%s'"),
5574 tmp_name
, name
) == -1)
5575 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
5582 /* ARM->Thumb glue (static images):
5586 ldr r12, __func_addr
5589 .word func @ behave as if you saw a ARM_32 reloc.
5596 .word func @ behave as if you saw a ARM_32 reloc.
5598 (relocatable images)
5601 ldr r12, __func_offset
5607 #define ARM2THUMB_STATIC_GLUE_SIZE 12
5608 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
5609 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
5610 static const insn32 a2t3_func_addr_insn
= 0x00000001;
5612 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
5613 static const insn32 a2t1v5_ldr_insn
= 0xe51ff004;
5614 static const insn32 a2t2v5_func_addr_insn
= 0x00000001;
5616 #define ARM2THUMB_PIC_GLUE_SIZE 16
5617 static const insn32 a2t1p_ldr_insn
= 0xe59fc004;
5618 static const insn32 a2t2p_add_pc_insn
= 0xe08cc00f;
5619 static const insn32 a2t3p_bx_r12_insn
= 0xe12fff1c;
5621 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
5625 __func_from_thumb: __func_from_thumb:
5627 nop ldr r6, __func_addr
5637 #define THUMB2ARM_GLUE_SIZE 8
5638 static const insn16 t2a1_bx_pc_insn
= 0x4778;
5639 static const insn16 t2a2_noop_insn
= 0x46c0;
5640 static const insn32 t2a3_b_insn
= 0xea000000;
5642 #define VFP11_ERRATUM_VENEER_SIZE 8
5644 #define ARM_BX_VENEER_SIZE 12
5645 static const insn32 armbx1_tst_insn
= 0xe3100001;
5646 static const insn32 armbx2_moveq_insn
= 0x01a0f000;
5647 static const insn32 armbx3_bx_insn
= 0xe12fff10;
5649 #ifndef ELFARM_NABI_C_INCLUDED
5651 arm_allocate_glue_section_space (bfd
* abfd
, bfd_size_type size
, const char * name
)
5654 bfd_byte
* contents
;
5658 /* Do not include empty glue sections in the output. */
5661 s
= bfd_get_linker_section (abfd
, name
);
5663 s
->flags
|= SEC_EXCLUDE
;
5668 BFD_ASSERT (abfd
!= NULL
);
5670 s
= bfd_get_linker_section (abfd
, name
);
5671 BFD_ASSERT (s
!= NULL
);
5673 contents
= (bfd_byte
*) bfd_alloc (abfd
, size
);
5675 BFD_ASSERT (s
->size
== size
);
5676 s
->contents
= contents
;
5680 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info
* info
)
5682 struct elf32_arm_link_hash_table
* globals
;
5684 globals
= elf32_arm_hash_table (info
);
5685 BFD_ASSERT (globals
!= NULL
);
5687 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5688 globals
->arm_glue_size
,
5689 ARM2THUMB_GLUE_SECTION_NAME
);
5691 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5692 globals
->thumb_glue_size
,
5693 THUMB2ARM_GLUE_SECTION_NAME
);
5695 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5696 globals
->vfp11_erratum_glue_size
,
5697 VFP11_ERRATUM_VENEER_SECTION_NAME
);
5699 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5700 globals
->bx_glue_size
,
5701 ARM_BX_GLUE_SECTION_NAME
);
5706 /* Allocate space and symbols for calling a Thumb function from Arm mode.
5707 returns the symbol identifying the stub. */
5709 static struct elf_link_hash_entry
*
5710 record_arm_to_thumb_glue (struct bfd_link_info
* link_info
,
5711 struct elf_link_hash_entry
* h
)
5713 const char * name
= h
->root
.root
.string
;
5716 struct elf_link_hash_entry
* myh
;
5717 struct bfd_link_hash_entry
* bh
;
5718 struct elf32_arm_link_hash_table
* globals
;
5722 globals
= elf32_arm_hash_table (link_info
);
5723 BFD_ASSERT (globals
!= NULL
);
5724 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5726 s
= bfd_get_linker_section
5727 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
5729 BFD_ASSERT (s
!= NULL
);
5731 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5732 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
5734 BFD_ASSERT (tmp_name
);
5736 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
5738 myh
= elf_link_hash_lookup
5739 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5743 /* We've already seen this guy. */
5748 /* The only trick here is using hash_table->arm_glue_size as the value.
5749 Even though the section isn't allocated yet, this is where we will be
5750 putting it. The +1 on the value marks that the stub has not been
5751 output yet - not that it is a Thumb function. */
5753 val
= globals
->arm_glue_size
+ 1;
5754 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5755 tmp_name
, BSF_GLOBAL
, s
, val
,
5756 NULL
, TRUE
, FALSE
, &bh
);
5758 myh
= (struct elf_link_hash_entry
*) bh
;
5759 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5760 myh
->forced_local
= 1;
5764 if (link_info
->shared
|| globals
->root
.is_relocatable_executable
5765 || globals
->pic_veneer
)
5766 size
= ARM2THUMB_PIC_GLUE_SIZE
;
5767 else if (globals
->use_blx
)
5768 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
5770 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
5773 globals
->arm_glue_size
+= size
;
5778 /* Allocate space for ARMv4 BX veneers. */
5781 record_arm_bx_glue (struct bfd_link_info
* link_info
, int reg
)
5784 struct elf32_arm_link_hash_table
*globals
;
5786 struct elf_link_hash_entry
*myh
;
5787 struct bfd_link_hash_entry
*bh
;
5790 /* BX PC does not need a veneer. */
5794 globals
= elf32_arm_hash_table (link_info
);
5795 BFD_ASSERT (globals
!= NULL
);
5796 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5798 /* Check if this veneer has already been allocated. */
5799 if (globals
->bx_glue_offset
[reg
])
5802 s
= bfd_get_linker_section
5803 (globals
->bfd_of_glue_owner
, ARM_BX_GLUE_SECTION_NAME
);
5805 BFD_ASSERT (s
!= NULL
);
5807 /* Add symbol for veneer. */
5809 bfd_malloc ((bfd_size_type
) strlen (ARM_BX_GLUE_ENTRY_NAME
) + 1);
5811 BFD_ASSERT (tmp_name
);
5813 sprintf (tmp_name
, ARM_BX_GLUE_ENTRY_NAME
, reg
);
5815 myh
= elf_link_hash_lookup
5816 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5818 BFD_ASSERT (myh
== NULL
);
5821 val
= globals
->bx_glue_size
;
5822 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5823 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5824 NULL
, TRUE
, FALSE
, &bh
);
5826 myh
= (struct elf_link_hash_entry
*) bh
;
5827 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5828 myh
->forced_local
= 1;
5830 s
->size
+= ARM_BX_VENEER_SIZE
;
5831 globals
->bx_glue_offset
[reg
] = globals
->bx_glue_size
| 2;
5832 globals
->bx_glue_size
+= ARM_BX_VENEER_SIZE
;
5836 /* Add an entry to the code/data map for section SEC. */
5839 elf32_arm_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
5841 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
5842 unsigned int newidx
;
5844 if (sec_data
->map
== NULL
)
5846 sec_data
->map
= (elf32_arm_section_map
*)
5847 bfd_malloc (sizeof (elf32_arm_section_map
));
5848 sec_data
->mapcount
= 0;
5849 sec_data
->mapsize
= 1;
5852 newidx
= sec_data
->mapcount
++;
5854 if (sec_data
->mapcount
> sec_data
->mapsize
)
5856 sec_data
->mapsize
*= 2;
5857 sec_data
->map
= (elf32_arm_section_map
*)
5858 bfd_realloc_or_free (sec_data
->map
, sec_data
->mapsize
5859 * sizeof (elf32_arm_section_map
));
5864 sec_data
->map
[newidx
].vma
= vma
;
5865 sec_data
->map
[newidx
].type
= type
;
5870 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
5871 veneers are handled for now. */
5874 record_vfp11_erratum_veneer (struct bfd_link_info
*link_info
,
5875 elf32_vfp11_erratum_list
*branch
,
5877 asection
*branch_sec
,
5878 unsigned int offset
)
5881 struct elf32_arm_link_hash_table
*hash_table
;
5883 struct elf_link_hash_entry
*myh
;
5884 struct bfd_link_hash_entry
*bh
;
5886 struct _arm_elf_section_data
*sec_data
;
5887 elf32_vfp11_erratum_list
*newerr
;
5889 hash_table
= elf32_arm_hash_table (link_info
);
5890 BFD_ASSERT (hash_table
!= NULL
);
5891 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
5893 s
= bfd_get_linker_section
5894 (hash_table
->bfd_of_glue_owner
, VFP11_ERRATUM_VENEER_SECTION_NAME
);
5896 sec_data
= elf32_arm_section_data (s
);
5898 BFD_ASSERT (s
!= NULL
);
5900 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
5901 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
5903 BFD_ASSERT (tmp_name
);
5905 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
5906 hash_table
->num_vfp11_fixes
);
5908 myh
= elf_link_hash_lookup
5909 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5911 BFD_ASSERT (myh
== NULL
);
5914 val
= hash_table
->vfp11_erratum_glue_size
;
5915 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
5916 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5917 NULL
, TRUE
, FALSE
, &bh
);
5919 myh
= (struct elf_link_hash_entry
*) bh
;
5920 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5921 myh
->forced_local
= 1;
5923 /* Link veneer back to calling location. */
5924 sec_data
->erratumcount
+= 1;
5925 newerr
= (elf32_vfp11_erratum_list
*)
5926 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
5928 newerr
->type
= VFP11_ERRATUM_ARM_VENEER
;
5930 newerr
->u
.v
.branch
= branch
;
5931 newerr
->u
.v
.id
= hash_table
->num_vfp11_fixes
;
5932 branch
->u
.b
.veneer
= newerr
;
5934 newerr
->next
= sec_data
->erratumlist
;
5935 sec_data
->erratumlist
= newerr
;
5937 /* A symbol for the return from the veneer. */
5938 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
5939 hash_table
->num_vfp11_fixes
);
5941 myh
= elf_link_hash_lookup
5942 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5949 _bfd_generic_link_add_one_symbol (link_info
, branch_bfd
, tmp_name
, BSF_LOCAL
,
5950 branch_sec
, val
, NULL
, TRUE
, FALSE
, &bh
);
5952 myh
= (struct elf_link_hash_entry
*) bh
;
5953 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5954 myh
->forced_local
= 1;
5958 /* Generate a mapping symbol for the veneer section, and explicitly add an
5959 entry for that symbol to the code/data map for the section. */
5960 if (hash_table
->vfp11_erratum_glue_size
== 0)
5963 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
5964 ever requires this erratum fix. */
5965 _bfd_generic_link_add_one_symbol (link_info
,
5966 hash_table
->bfd_of_glue_owner
, "$a",
5967 BSF_LOCAL
, s
, 0, NULL
,
5970 myh
= (struct elf_link_hash_entry
*) bh
;
5971 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
5972 myh
->forced_local
= 1;
5974 /* The elf32_arm_init_maps function only cares about symbols from input
5975 BFDs. We must make a note of this generated mapping symbol
5976 ourselves so that code byteswapping works properly in
5977 elf32_arm_write_section. */
5978 elf32_arm_section_map_add (s
, 'a', 0);
5981 s
->size
+= VFP11_ERRATUM_VENEER_SIZE
;
5982 hash_table
->vfp11_erratum_glue_size
+= VFP11_ERRATUM_VENEER_SIZE
;
5983 hash_table
->num_vfp11_fixes
++;
5985 /* The offset of the veneer. */
5989 #define ARM_GLUE_SECTION_FLAGS \
5990 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
5991 | SEC_READONLY | SEC_LINKER_CREATED)
5993 /* Create a fake section for use by the ARM backend of the linker. */
5996 arm_make_glue_section (bfd
* abfd
, const char * name
)
6000 sec
= bfd_get_linker_section (abfd
, name
);
6005 sec
= bfd_make_section_anyway_with_flags (abfd
, name
, ARM_GLUE_SECTION_FLAGS
);
6008 || !bfd_set_section_alignment (abfd
, sec
, 2))
6011 /* Set the gc mark to prevent the section from being removed by garbage
6012 collection, despite the fact that no relocs refer to this section. */
6018 /* Add the glue sections to ABFD. This function is called from the
6019 linker scripts in ld/emultempl/{armelf}.em. */
6022 bfd_elf32_arm_add_glue_sections_to_bfd (bfd
*abfd
,
6023 struct bfd_link_info
*info
)
6025 /* If we are only performing a partial
6026 link do not bother adding the glue. */
6027 if (info
->relocatable
)
6030 return arm_make_glue_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
)
6031 && arm_make_glue_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
)
6032 && arm_make_glue_section (abfd
, VFP11_ERRATUM_VENEER_SECTION_NAME
)
6033 && arm_make_glue_section (abfd
, ARM_BX_GLUE_SECTION_NAME
);
6036 /* Select a BFD to be used to hold the sections used by the glue code.
6037 This function is called from the linker scripts in ld/emultempl/
6041 bfd_elf32_arm_get_bfd_for_interworking (bfd
*abfd
, struct bfd_link_info
*info
)
6043 struct elf32_arm_link_hash_table
*globals
;
6045 /* If we are only performing a partial link
6046 do not bother getting a bfd to hold the glue. */
6047 if (info
->relocatable
)
6050 /* Make sure we don't attach the glue sections to a dynamic object. */
6051 BFD_ASSERT (!(abfd
->flags
& DYNAMIC
));
6053 globals
= elf32_arm_hash_table (info
);
6054 BFD_ASSERT (globals
!= NULL
);
6056 if (globals
->bfd_of_glue_owner
!= NULL
)
6059 /* Save the bfd for later use. */
6060 globals
->bfd_of_glue_owner
= abfd
;
6066 check_use_blx (struct elf32_arm_link_hash_table
*globals
)
6070 cpu_arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
6073 if (globals
->fix_arm1176
)
6075 if (cpu_arch
== TAG_CPU_ARCH_V6T2
|| cpu_arch
> TAG_CPU_ARCH_V6K
)
6076 globals
->use_blx
= 1;
6080 if (cpu_arch
> TAG_CPU_ARCH_V4T
)
6081 globals
->use_blx
= 1;
6086 bfd_elf32_arm_process_before_allocation (bfd
*abfd
,
6087 struct bfd_link_info
*link_info
)
6089 Elf_Internal_Shdr
*symtab_hdr
;
6090 Elf_Internal_Rela
*internal_relocs
= NULL
;
6091 Elf_Internal_Rela
*irel
, *irelend
;
6092 bfd_byte
*contents
= NULL
;
6095 struct elf32_arm_link_hash_table
*globals
;
6097 /* If we are only performing a partial link do not bother
6098 to construct any glue. */
6099 if (link_info
->relocatable
)
6102 /* Here we have a bfd that is to be included on the link. We have a
6103 hook to do reloc rummaging, before section sizes are nailed down. */
6104 globals
= elf32_arm_hash_table (link_info
);
6105 BFD_ASSERT (globals
!= NULL
);
6107 check_use_blx (globals
);
6109 if (globals
->byteswap_code
&& !bfd_big_endian (abfd
))
6111 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
6116 /* PR 5398: If we have not decided to include any loadable sections in
6117 the output then we will not have a glue owner bfd. This is OK, it
6118 just means that there is nothing else for us to do here. */
6119 if (globals
->bfd_of_glue_owner
== NULL
)
6122 /* Rummage around all the relocs and map the glue vectors. */
6123 sec
= abfd
->sections
;
6128 for (; sec
!= NULL
; sec
= sec
->next
)
6130 if (sec
->reloc_count
== 0)
6133 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
6136 symtab_hdr
= & elf_symtab_hdr (abfd
);
6138 /* Load the relocs. */
6140 = _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, FALSE
);
6142 if (internal_relocs
== NULL
)
6145 irelend
= internal_relocs
+ sec
->reloc_count
;
6146 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
6149 unsigned long r_index
;
6151 struct elf_link_hash_entry
*h
;
6153 r_type
= ELF32_R_TYPE (irel
->r_info
);
6154 r_index
= ELF32_R_SYM (irel
->r_info
);
6156 /* These are the only relocation types we care about. */
6157 if ( r_type
!= R_ARM_PC24
6158 && (r_type
!= R_ARM_V4BX
|| globals
->fix_v4bx
< 2))
6161 /* Get the section contents if we haven't done so already. */
6162 if (contents
== NULL
)
6164 /* Get cached copy if it exists. */
6165 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
6166 contents
= elf_section_data (sec
)->this_hdr
.contents
;
6169 /* Go get them off disk. */
6170 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
6175 if (r_type
== R_ARM_V4BX
)
6179 reg
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
) & 0xf;
6180 record_arm_bx_glue (link_info
, reg
);
6184 /* If the relocation is not against a symbol it cannot concern us. */
6187 /* We don't care about local symbols. */
6188 if (r_index
< symtab_hdr
->sh_info
)
6191 /* This is an external symbol. */
6192 r_index
-= symtab_hdr
->sh_info
;
6193 h
= (struct elf_link_hash_entry
*)
6194 elf_sym_hashes (abfd
)[r_index
];
6196 /* If the relocation is against a static symbol it must be within
6197 the current section and so cannot be a cross ARM/Thumb relocation. */
6201 /* If the call will go through a PLT entry then we do not need
6203 if (globals
->root
.splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
6209 /* This one is a call from arm code. We need to look up
6210 the target of the call. If it is a thumb target, we
6212 if (h
->target_internal
== ST_BRANCH_TO_THUMB
)
6213 record_arm_to_thumb_glue (link_info
, h
);
6221 if (contents
!= NULL
6222 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6226 if (internal_relocs
!= NULL
6227 && elf_section_data (sec
)->relocs
!= internal_relocs
)
6228 free (internal_relocs
);
6229 internal_relocs
= NULL
;
6235 if (contents
!= NULL
6236 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6238 if (internal_relocs
!= NULL
6239 && elf_section_data (sec
)->relocs
!= internal_relocs
)
6240 free (internal_relocs
);
6247 /* Initialise maps of ARM/Thumb/data for input BFDs. */
6250 bfd_elf32_arm_init_maps (bfd
*abfd
)
6252 Elf_Internal_Sym
*isymbuf
;
6253 Elf_Internal_Shdr
*hdr
;
6254 unsigned int i
, localsyms
;
6256 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
6257 if (! is_arm_elf (abfd
))
6260 if ((abfd
->flags
& DYNAMIC
) != 0)
6263 hdr
= & elf_symtab_hdr (abfd
);
6264 localsyms
= hdr
->sh_info
;
6266 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
6267 should contain the number of local symbols, which should come before any
6268 global symbols. Mapping symbols are always local. */
6269 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
,
6272 /* No internal symbols read? Skip this BFD. */
6273 if (isymbuf
== NULL
)
6276 for (i
= 0; i
< localsyms
; i
++)
6278 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
6279 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
6283 && ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
6285 name
= bfd_elf_string_from_elf_section (abfd
,
6286 hdr
->sh_link
, isym
->st_name
);
6288 if (bfd_is_arm_special_symbol_name (name
,
6289 BFD_ARM_SPECIAL_SYM_TYPE_MAP
))
6290 elf32_arm_section_map_add (sec
, name
[1], isym
->st_value
);
6296 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
6297 say what they wanted. */
6300 bfd_elf32_arm_set_cortex_a8_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
6302 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6303 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
6305 if (globals
== NULL
)
6308 if (globals
->fix_cortex_a8
== -1)
6310 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
6311 if (out_attr
[Tag_CPU_arch
].i
== TAG_CPU_ARCH_V7
6312 && (out_attr
[Tag_CPU_arch_profile
].i
== 'A'
6313 || out_attr
[Tag_CPU_arch_profile
].i
== 0))
6314 globals
->fix_cortex_a8
= 1;
6316 globals
->fix_cortex_a8
= 0;
6322 bfd_elf32_arm_set_vfp11_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
6324 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6325 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
6327 if (globals
== NULL
)
6329 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
6330 if (out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V7
)
6332 switch (globals
->vfp11_fix
)
6334 case BFD_ARM_VFP11_FIX_DEFAULT
:
6335 case BFD_ARM_VFP11_FIX_NONE
:
6336 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
6340 /* Give a warning, but do as the user requests anyway. */
6341 (*_bfd_error_handler
) (_("%B: warning: selected VFP11 erratum "
6342 "workaround is not necessary for target architecture"), obfd
);
6345 else if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_DEFAULT
)
6346 /* For earlier architectures, we might need the workaround, but do not
6347 enable it by default. If users is running with broken hardware, they
6348 must enable the erratum fix explicitly. */
6349 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
6353 enum bfd_arm_vfp11_pipe
6361 /* Return a VFP register number. This is encoded as RX:X for single-precision
6362 registers, or X:RX for double-precision registers, where RX is the group of
6363 four bits in the instruction encoding and X is the single extension bit.
6364 RX and X fields are specified using their lowest (starting) bit. The return
6367 0...31: single-precision registers s0...s31
6368 32...63: double-precision registers d0...d31.
6370 Although X should be zero for VFP11 (encoding d0...d15 only), we might
6371 encounter VFP3 instructions, so we allow the full range for DP registers. */
6374 bfd_arm_vfp11_regno (unsigned int insn
, bfd_boolean is_double
, unsigned int rx
,
6378 return (((insn
>> rx
) & 0xf) | (((insn
>> x
) & 1) << 4)) + 32;
6380 return (((insn
>> rx
) & 0xf) << 1) | ((insn
>> x
) & 1);
6383 /* Set bits in *WMASK according to a register number REG as encoded by
6384 bfd_arm_vfp11_regno(). Ignore d16-d31. */
6387 bfd_arm_vfp11_write_mask (unsigned int *wmask
, unsigned int reg
)
6392 *wmask
|= 3 << ((reg
- 32) * 2);
6395 /* Return TRUE if WMASK overwrites anything in REGS. */
6398 bfd_arm_vfp11_antidependency (unsigned int wmask
, int *regs
, int numregs
)
6402 for (i
= 0; i
< numregs
; i
++)
6404 unsigned int reg
= regs
[i
];
6406 if (reg
< 32 && (wmask
& (1 << reg
)) != 0)
6414 if ((wmask
& (3 << (reg
* 2))) != 0)
6421 /* In this function, we're interested in two things: finding input registers
6422 for VFP data-processing instructions, and finding the set of registers which
6423 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
6424 hold the written set, so FLDM etc. are easy to deal with (we're only
6425 interested in 32 SP registers or 16 dp registers, due to the VFP version
6426 implemented by the chip in question). DP registers are marked by setting
6427 both SP registers in the write mask). */
6429 static enum bfd_arm_vfp11_pipe
6430 bfd_arm_vfp11_insn_decode (unsigned int insn
, unsigned int *destmask
, int *regs
,
6433 enum bfd_arm_vfp11_pipe vpipe
= VFP11_BAD
;
6434 bfd_boolean is_double
= ((insn
& 0xf00) == 0xb00) ? 1 : 0;
6436 if ((insn
& 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
6439 unsigned int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
6440 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
6442 pqrs
= ((insn
& 0x00800000) >> 20)
6443 | ((insn
& 0x00300000) >> 19)
6444 | ((insn
& 0x00000040) >> 6);
6448 case 0: /* fmac[sd]. */
6449 case 1: /* fnmac[sd]. */
6450 case 2: /* fmsc[sd]. */
6451 case 3: /* fnmsc[sd]. */
6453 bfd_arm_vfp11_write_mask (destmask
, fd
);
6455 regs
[1] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
6460 case 4: /* fmul[sd]. */
6461 case 5: /* fnmul[sd]. */
6462 case 6: /* fadd[sd]. */
6463 case 7: /* fsub[sd]. */
6467 case 8: /* fdiv[sd]. */
6470 bfd_arm_vfp11_write_mask (destmask
, fd
);
6471 regs
[0] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
6476 case 15: /* extended opcode. */
6478 unsigned int extn
= ((insn
>> 15) & 0x1e)
6479 | ((insn
>> 7) & 1);
6483 case 0: /* fcpy[sd]. */
6484 case 1: /* fabs[sd]. */
6485 case 2: /* fneg[sd]. */
6486 case 8: /* fcmp[sd]. */
6487 case 9: /* fcmpe[sd]. */
6488 case 10: /* fcmpz[sd]. */
6489 case 11: /* fcmpez[sd]. */
6490 case 16: /* fuito[sd]. */
6491 case 17: /* fsito[sd]. */
6492 case 24: /* ftoui[sd]. */
6493 case 25: /* ftouiz[sd]. */
6494 case 26: /* ftosi[sd]. */
6495 case 27: /* ftosiz[sd]. */
6496 /* These instructions will not bounce due to underflow. */
6501 case 3: /* fsqrt[sd]. */
6502 /* fsqrt cannot underflow, but it can (perhaps) overwrite
6503 registers to cause the erratum in previous instructions. */
6504 bfd_arm_vfp11_write_mask (destmask
, fd
);
6508 case 15: /* fcvt{ds,sd}. */
6512 bfd_arm_vfp11_write_mask (destmask
, fd
);
6514 /* Only FCVTSD can underflow. */
6515 if ((insn
& 0x100) != 0)
6534 /* Two-register transfer. */
6535 else if ((insn
& 0x0fe00ed0) == 0x0c400a10)
6537 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
6539 if ((insn
& 0x100000) == 0)
6542 bfd_arm_vfp11_write_mask (destmask
, fm
);
6545 bfd_arm_vfp11_write_mask (destmask
, fm
);
6546 bfd_arm_vfp11_write_mask (destmask
, fm
+ 1);
6552 else if ((insn
& 0x0e100e00) == 0x0c100a00) /* A load insn. */
6554 int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
6555 unsigned int puw
= ((insn
>> 21) & 0x1) | (((insn
>> 23) & 3) << 1);
6559 case 0: /* Two-reg transfer. We should catch these above. */
6562 case 2: /* fldm[sdx]. */
6566 unsigned int i
, offset
= insn
& 0xff;
6571 for (i
= fd
; i
< fd
+ offset
; i
++)
6572 bfd_arm_vfp11_write_mask (destmask
, i
);
6576 case 4: /* fld[sd]. */
6578 bfd_arm_vfp11_write_mask (destmask
, fd
);
6587 /* Single-register transfer. Note L==0. */
6588 else if ((insn
& 0x0f100e10) == 0x0e000a10)
6590 unsigned int opcode
= (insn
>> 21) & 7;
6591 unsigned int fn
= bfd_arm_vfp11_regno (insn
, is_double
, 16, 7);
6595 case 0: /* fmsr/fmdlr. */
6596 case 1: /* fmdhr. */
6597 /* Mark fmdhr and fmdlr as writing to the whole of the DP
6598 destination register. I don't know if this is exactly right,
6599 but it is the conservative choice. */
6600 bfd_arm_vfp11_write_mask (destmask
, fn
);
6614 static int elf32_arm_compare_mapping (const void * a
, const void * b
);
6617 /* Look for potentially-troublesome code sequences which might trigger the
6618 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
6619 (available from ARM) for details of the erratum. A short version is
6620 described in ld.texinfo. */
6623 bfd_elf32_arm_vfp11_erratum_scan (bfd
*abfd
, struct bfd_link_info
*link_info
)
6626 bfd_byte
*contents
= NULL
;
6628 int regs
[3], numregs
= 0;
6629 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6630 int use_vector
= (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_VECTOR
);
6632 if (globals
== NULL
)
6635 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
6636 The states transition as follows:
6638 0 -> 1 (vector) or 0 -> 2 (scalar)
6639 A VFP FMAC-pipeline instruction has been seen. Fill
6640 regs[0]..regs[numregs-1] with its input operands. Remember this
6641 instruction in 'first_fmac'.
6644 Any instruction, except for a VFP instruction which overwrites
6649 A VFP instruction has been seen which overwrites any of regs[*].
6650 We must make a veneer! Reset state to 0 before examining next
6654 If we fail to match anything in state 2, reset to state 0 and reset
6655 the instruction pointer to the instruction after 'first_fmac'.
6657 If the VFP11 vector mode is in use, there must be at least two unrelated
6658 instructions between anti-dependent VFP11 instructions to properly avoid
6659 triggering the erratum, hence the use of the extra state 1. */
6661 /* If we are only performing a partial link do not bother
6662 to construct any glue. */
6663 if (link_info
->relocatable
)
6666 /* Skip if this bfd does not correspond to an ELF image. */
6667 if (! is_arm_elf (abfd
))
6670 /* We should have chosen a fix type by the time we get here. */
6671 BFD_ASSERT (globals
->vfp11_fix
!= BFD_ARM_VFP11_FIX_DEFAULT
);
6673 if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_NONE
)
6676 /* Skip this BFD if it corresponds to an executable or dynamic object. */
6677 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
6680 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6682 unsigned int i
, span
, first_fmac
= 0, veneer_of_insn
= 0;
6683 struct _arm_elf_section_data
*sec_data
;
6685 /* If we don't have executable progbits, we're not interested in this
6686 section. Also skip if section is to be excluded. */
6687 if (elf_section_type (sec
) != SHT_PROGBITS
6688 || (elf_section_flags (sec
) & SHF_EXECINSTR
) == 0
6689 || (sec
->flags
& SEC_EXCLUDE
) != 0
6690 || sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
6691 || sec
->output_section
== bfd_abs_section_ptr
6692 || strcmp (sec
->name
, VFP11_ERRATUM_VENEER_SECTION_NAME
) == 0)
6695 sec_data
= elf32_arm_section_data (sec
);
6697 if (sec_data
->mapcount
== 0)
6700 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
6701 contents
= elf_section_data (sec
)->this_hdr
.contents
;
6702 else if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
6705 qsort (sec_data
->map
, sec_data
->mapcount
, sizeof (elf32_arm_section_map
),
6706 elf32_arm_compare_mapping
);
6708 for (span
= 0; span
< sec_data
->mapcount
; span
++)
6710 unsigned int span_start
= sec_data
->map
[span
].vma
;
6711 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
6712 ? sec
->size
: sec_data
->map
[span
+ 1].vma
;
6713 char span_type
= sec_data
->map
[span
].type
;
6715 /* FIXME: Only ARM mode is supported at present. We may need to
6716 support Thumb-2 mode also at some point. */
6717 if (span_type
!= 'a')
6720 for (i
= span_start
; i
< span_end
;)
6722 unsigned int next_i
= i
+ 4;
6723 unsigned int insn
= bfd_big_endian (abfd
)
6724 ? (contents
[i
] << 24)
6725 | (contents
[i
+ 1] << 16)
6726 | (contents
[i
+ 2] << 8)
6728 : (contents
[i
+ 3] << 24)
6729 | (contents
[i
+ 2] << 16)
6730 | (contents
[i
+ 1] << 8)
6732 unsigned int writemask
= 0;
6733 enum bfd_arm_vfp11_pipe vpipe
;
6738 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
, regs
,
6740 /* I'm assuming the VFP11 erratum can trigger with denorm
6741 operands on either the FMAC or the DS pipeline. This might
6742 lead to slightly overenthusiastic veneer insertion. */
6743 if (vpipe
== VFP11_FMAC
|| vpipe
== VFP11_DS
)
6745 state
= use_vector
? 1 : 2;
6747 veneer_of_insn
= insn
;
6753 int other_regs
[3], other_numregs
;
6754 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6757 if (vpipe
!= VFP11_BAD
6758 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6768 int other_regs
[3], other_numregs
;
6769 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6772 if (vpipe
!= VFP11_BAD
6773 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6779 next_i
= first_fmac
+ 4;
6785 abort (); /* Should be unreachable. */
6790 elf32_vfp11_erratum_list
*newerr
=(elf32_vfp11_erratum_list
*)
6791 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
6793 elf32_arm_section_data (sec
)->erratumcount
+= 1;
6795 newerr
->u
.b
.vfp_insn
= veneer_of_insn
;
6800 newerr
->type
= VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
;
6807 record_vfp11_erratum_veneer (link_info
, newerr
, abfd
, sec
,
6812 newerr
->next
= sec_data
->erratumlist
;
6813 sec_data
->erratumlist
= newerr
;
6822 if (contents
!= NULL
6823 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6831 if (contents
!= NULL
6832 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6838 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
6839 after sections have been laid out, using specially-named symbols. */
6842 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd
*abfd
,
6843 struct bfd_link_info
*link_info
)
6846 struct elf32_arm_link_hash_table
*globals
;
6849 if (link_info
->relocatable
)
6852 /* Skip if this bfd does not correspond to an ELF image. */
6853 if (! is_arm_elf (abfd
))
6856 globals
= elf32_arm_hash_table (link_info
);
6857 if (globals
== NULL
)
6860 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
6861 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
6863 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6865 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
6866 elf32_vfp11_erratum_list
*errnode
= sec_data
->erratumlist
;
6868 for (; errnode
!= NULL
; errnode
= errnode
->next
)
6870 struct elf_link_hash_entry
*myh
;
6873 switch (errnode
->type
)
6875 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
6876 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
:
6877 /* Find veneer symbol. */
6878 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
6879 errnode
->u
.b
.veneer
->u
.v
.id
);
6881 myh
= elf_link_hash_lookup
6882 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6885 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6886 "`%s'"), abfd
, tmp_name
);
6888 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6889 + myh
->root
.u
.def
.section
->output_offset
6890 + myh
->root
.u
.def
.value
;
6892 errnode
->u
.b
.veneer
->vma
= vma
;
6895 case VFP11_ERRATUM_ARM_VENEER
:
6896 case VFP11_ERRATUM_THUMB_VENEER
:
6897 /* Find return location. */
6898 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
6901 myh
= elf_link_hash_lookup
6902 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6905 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6906 "`%s'"), abfd
, tmp_name
);
6908 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6909 + myh
->root
.u
.def
.section
->output_offset
6910 + myh
->root
.u
.def
.value
;
6912 errnode
->u
.v
.branch
->vma
= vma
;
6925 /* Set target relocation values needed during linking. */
6928 bfd_elf32_arm_set_target_relocs (struct bfd
*output_bfd
,
6929 struct bfd_link_info
*link_info
,
6931 char * target2_type
,
6934 bfd_arm_vfp11_fix vfp11_fix
,
6935 int no_enum_warn
, int no_wchar_warn
,
6936 int pic_veneer
, int fix_cortex_a8
,
6939 struct elf32_arm_link_hash_table
*globals
;
6941 globals
= elf32_arm_hash_table (link_info
);
6942 if (globals
== NULL
)
6945 globals
->target1_is_rel
= target1_is_rel
;
6946 if (strcmp (target2_type
, "rel") == 0)
6947 globals
->target2_reloc
= R_ARM_REL32
;
6948 else if (strcmp (target2_type
, "abs") == 0)
6949 globals
->target2_reloc
= R_ARM_ABS32
;
6950 else if (strcmp (target2_type
, "got-rel") == 0)
6951 globals
->target2_reloc
= R_ARM_GOT_PREL
;
6954 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
6957 globals
->fix_v4bx
= fix_v4bx
;
6958 globals
->use_blx
|= use_blx
;
6959 globals
->vfp11_fix
= vfp11_fix
;
6960 globals
->pic_veneer
= pic_veneer
;
6961 globals
->fix_cortex_a8
= fix_cortex_a8
;
6962 globals
->fix_arm1176
= fix_arm1176
;
6964 BFD_ASSERT (is_arm_elf (output_bfd
));
6965 elf_arm_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
6966 elf_arm_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
6969 /* Replace the target offset of a Thumb bl or b.w instruction. */
6972 insert_thumb_branch (bfd
*abfd
, long int offset
, bfd_byte
*insn
)
6978 BFD_ASSERT ((offset
& 1) == 0);
6980 upper
= bfd_get_16 (abfd
, insn
);
6981 lower
= bfd_get_16 (abfd
, insn
+ 2);
6982 reloc_sign
= (offset
< 0) ? 1 : 0;
6983 upper
= (upper
& ~(bfd_vma
) 0x7ff)
6984 | ((offset
>> 12) & 0x3ff)
6985 | (reloc_sign
<< 10);
6986 lower
= (lower
& ~(bfd_vma
) 0x2fff)
6987 | (((!((offset
>> 23) & 1)) ^ reloc_sign
) << 13)
6988 | (((!((offset
>> 22) & 1)) ^ reloc_sign
) << 11)
6989 | ((offset
>> 1) & 0x7ff);
6990 bfd_put_16 (abfd
, upper
, insn
);
6991 bfd_put_16 (abfd
, lower
, insn
+ 2);
6994 /* Thumb code calling an ARM function. */
6997 elf32_thumb_to_arm_stub (struct bfd_link_info
* info
,
7001 asection
* input_section
,
7002 bfd_byte
* hit_data
,
7005 bfd_signed_vma addend
,
7007 char **error_message
)
7011 long int ret_offset
;
7012 struct elf_link_hash_entry
* myh
;
7013 struct elf32_arm_link_hash_table
* globals
;
7015 myh
= find_thumb_glue (info
, name
, error_message
);
7019 globals
= elf32_arm_hash_table (info
);
7020 BFD_ASSERT (globals
!= NULL
);
7021 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7023 my_offset
= myh
->root
.u
.def
.value
;
7025 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
7026 THUMB2ARM_GLUE_SECTION_NAME
);
7028 BFD_ASSERT (s
!= NULL
);
7029 BFD_ASSERT (s
->contents
!= NULL
);
7030 BFD_ASSERT (s
->output_section
!= NULL
);
7032 if ((my_offset
& 0x01) == 0x01)
7035 && sym_sec
->owner
!= NULL
7036 && !INTERWORK_FLAG (sym_sec
->owner
))
7038 (*_bfd_error_handler
)
7039 (_("%B(%s): warning: interworking not enabled.\n"
7040 " first occurrence: %B: Thumb call to ARM"),
7041 sym_sec
->owner
, input_bfd
, name
);
7047 myh
->root
.u
.def
.value
= my_offset
;
7049 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
7050 s
->contents
+ my_offset
);
7052 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a2_noop_insn
,
7053 s
->contents
+ my_offset
+ 2);
7056 /* Address of destination of the stub. */
7057 ((bfd_signed_vma
) val
)
7059 /* Offset from the start of the current section
7060 to the start of the stubs. */
7062 /* Offset of the start of this stub from the start of the stubs. */
7064 /* Address of the start of the current section. */
7065 + s
->output_section
->vma
)
7066 /* The branch instruction is 4 bytes into the stub. */
7068 /* ARM branches work from the pc of the instruction + 8. */
7071 put_arm_insn (globals
, output_bfd
,
7072 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
7073 s
->contents
+ my_offset
+ 4);
7076 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
7078 /* Now go back and fix up the original BL insn to point to here. */
7080 /* Address of where the stub is located. */
7081 (s
->output_section
->vma
+ s
->output_offset
+ my_offset
)
7082 /* Address of where the BL is located. */
7083 - (input_section
->output_section
->vma
+ input_section
->output_offset
7085 /* Addend in the relocation. */
7087 /* Biassing for PC-relative addressing. */
7090 insert_thumb_branch (input_bfd
, ret_offset
, hit_data
- input_section
->vma
);
7095 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
7097 static struct elf_link_hash_entry
*
7098 elf32_arm_create_thumb_stub (struct bfd_link_info
* info
,
7105 char ** error_message
)
7108 long int ret_offset
;
7109 struct elf_link_hash_entry
* myh
;
7110 struct elf32_arm_link_hash_table
* globals
;
7112 myh
= find_arm_glue (info
, name
, error_message
);
7116 globals
= elf32_arm_hash_table (info
);
7117 BFD_ASSERT (globals
!= NULL
);
7118 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7120 my_offset
= myh
->root
.u
.def
.value
;
7122 if ((my_offset
& 0x01) == 0x01)
7125 && sym_sec
->owner
!= NULL
7126 && !INTERWORK_FLAG (sym_sec
->owner
))
7128 (*_bfd_error_handler
)
7129 (_("%B(%s): warning: interworking not enabled.\n"
7130 " first occurrence: %B: arm call to thumb"),
7131 sym_sec
->owner
, input_bfd
, name
);
7135 myh
->root
.u
.def
.value
= my_offset
;
7137 if (info
->shared
|| globals
->root
.is_relocatable_executable
7138 || globals
->pic_veneer
)
7140 /* For relocatable objects we can't use absolute addresses,
7141 so construct the address from a relative offset. */
7142 /* TODO: If the offset is small it's probably worth
7143 constructing the address with adds. */
7144 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1p_ldr_insn
,
7145 s
->contents
+ my_offset
);
7146 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2p_add_pc_insn
,
7147 s
->contents
+ my_offset
+ 4);
7148 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t3p_bx_r12_insn
,
7149 s
->contents
+ my_offset
+ 8);
7150 /* Adjust the offset by 4 for the position of the add,
7151 and 8 for the pipeline offset. */
7152 ret_offset
= (val
- (s
->output_offset
7153 + s
->output_section
->vma
7156 bfd_put_32 (output_bfd
, ret_offset
,
7157 s
->contents
+ my_offset
+ 12);
7159 else if (globals
->use_blx
)
7161 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1v5_ldr_insn
,
7162 s
->contents
+ my_offset
);
7164 /* It's a thumb address. Add the low order bit. */
7165 bfd_put_32 (output_bfd
, val
| a2t2v5_func_addr_insn
,
7166 s
->contents
+ my_offset
+ 4);
7170 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
7171 s
->contents
+ my_offset
);
7173 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
7174 s
->contents
+ my_offset
+ 4);
7176 /* It's a thumb address. Add the low order bit. */
7177 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
7178 s
->contents
+ my_offset
+ 8);
7184 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
7189 /* Arm code calling a Thumb function. */
7192 elf32_arm_to_thumb_stub (struct bfd_link_info
* info
,
7196 asection
* input_section
,
7197 bfd_byte
* hit_data
,
7200 bfd_signed_vma addend
,
7202 char **error_message
)
7204 unsigned long int tmp
;
7207 long int ret_offset
;
7208 struct elf_link_hash_entry
* myh
;
7209 struct elf32_arm_link_hash_table
* globals
;
7211 globals
= elf32_arm_hash_table (info
);
7212 BFD_ASSERT (globals
!= NULL
);
7213 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7215 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
7216 ARM2THUMB_GLUE_SECTION_NAME
);
7217 BFD_ASSERT (s
!= NULL
);
7218 BFD_ASSERT (s
->contents
!= NULL
);
7219 BFD_ASSERT (s
->output_section
!= NULL
);
7221 myh
= elf32_arm_create_thumb_stub (info
, name
, input_bfd
, output_bfd
,
7222 sym_sec
, val
, s
, error_message
);
7226 my_offset
= myh
->root
.u
.def
.value
;
7227 tmp
= bfd_get_32 (input_bfd
, hit_data
);
7228 tmp
= tmp
& 0xFF000000;
7230 /* Somehow these are both 4 too far, so subtract 8. */
7231 ret_offset
= (s
->output_offset
7233 + s
->output_section
->vma
7234 - (input_section
->output_offset
7235 + input_section
->output_section
->vma
7239 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
7241 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
, hit_data
- input_section
->vma
);
7246 /* Populate Arm stub for an exported Thumb function. */
7249 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry
*h
, void * inf
)
7251 struct bfd_link_info
* info
= (struct bfd_link_info
*) inf
;
7253 struct elf_link_hash_entry
* myh
;
7254 struct elf32_arm_link_hash_entry
*eh
;
7255 struct elf32_arm_link_hash_table
* globals
;
7258 char *error_message
;
7260 eh
= elf32_arm_hash_entry (h
);
7261 /* Allocate stubs for exported Thumb functions on v4t. */
7262 if (eh
->export_glue
== NULL
)
7265 globals
= elf32_arm_hash_table (info
);
7266 BFD_ASSERT (globals
!= NULL
);
7267 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7269 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
7270 ARM2THUMB_GLUE_SECTION_NAME
);
7271 BFD_ASSERT (s
!= NULL
);
7272 BFD_ASSERT (s
->contents
!= NULL
);
7273 BFD_ASSERT (s
->output_section
!= NULL
);
7275 sec
= eh
->export_glue
->root
.u
.def
.section
;
7277 BFD_ASSERT (sec
->output_section
!= NULL
);
7279 val
= eh
->export_glue
->root
.u
.def
.value
+ sec
->output_offset
7280 + sec
->output_section
->vma
;
7282 myh
= elf32_arm_create_thumb_stub (info
, h
->root
.root
.string
,
7283 h
->root
.u
.def
.section
->owner
,
7284 globals
->obfd
, sec
, val
, s
,
7290 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
7293 elf32_arm_bx_glue (struct bfd_link_info
* info
, int reg
)
7298 struct elf32_arm_link_hash_table
*globals
;
7300 globals
= elf32_arm_hash_table (info
);
7301 BFD_ASSERT (globals
!= NULL
);
7302 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7304 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
7305 ARM_BX_GLUE_SECTION_NAME
);
7306 BFD_ASSERT (s
!= NULL
);
7307 BFD_ASSERT (s
->contents
!= NULL
);
7308 BFD_ASSERT (s
->output_section
!= NULL
);
7310 BFD_ASSERT (globals
->bx_glue_offset
[reg
] & 2);
7312 glue_addr
= globals
->bx_glue_offset
[reg
] & ~(bfd_vma
)3;
7314 if ((globals
->bx_glue_offset
[reg
] & 1) == 0)
7316 p
= s
->contents
+ glue_addr
;
7317 bfd_put_32 (globals
->obfd
, armbx1_tst_insn
+ (reg
<< 16), p
);
7318 bfd_put_32 (globals
->obfd
, armbx2_moveq_insn
+ reg
, p
+ 4);
7319 bfd_put_32 (globals
->obfd
, armbx3_bx_insn
+ reg
, p
+ 8);
7320 globals
->bx_glue_offset
[reg
] |= 1;
7323 return glue_addr
+ s
->output_section
->vma
+ s
->output_offset
;
7326 /* Generate Arm stubs for exported Thumb symbols. */
7328 elf32_arm_begin_write_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
7329 struct bfd_link_info
*link_info
)
7331 struct elf32_arm_link_hash_table
* globals
;
7333 if (link_info
== NULL
)
7334 /* Ignore this if we are not called by the ELF backend linker. */
7337 globals
= elf32_arm_hash_table (link_info
);
7338 if (globals
== NULL
)
7341 /* If blx is available then exported Thumb symbols are OK and there is
7343 if (globals
->use_blx
)
7346 elf_link_hash_traverse (&globals
->root
, elf32_arm_to_thumb_export_stub
,
7350 /* Reserve space for COUNT dynamic relocations in relocation selection
7354 elf32_arm_allocate_dynrelocs (struct bfd_link_info
*info
, asection
*sreloc
,
7355 bfd_size_type count
)
7357 struct elf32_arm_link_hash_table
*htab
;
7359 htab
= elf32_arm_hash_table (info
);
7360 BFD_ASSERT (htab
->root
.dynamic_sections_created
);
7363 sreloc
->size
+= RELOC_SIZE (htab
) * count
;
7366 /* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is
7367 dynamic, the relocations should go in SRELOC, otherwise they should
7368 go in the special .rel.iplt section. */
7371 elf32_arm_allocate_irelocs (struct bfd_link_info
*info
, asection
*sreloc
,
7372 bfd_size_type count
)
7374 struct elf32_arm_link_hash_table
*htab
;
7376 htab
= elf32_arm_hash_table (info
);
7377 if (!htab
->root
.dynamic_sections_created
)
7378 htab
->root
.irelplt
->size
+= RELOC_SIZE (htab
) * count
;
7381 BFD_ASSERT (sreloc
!= NULL
);
7382 sreloc
->size
+= RELOC_SIZE (htab
) * count
;
7386 /* Add relocation REL to the end of relocation section SRELOC. */
7389 elf32_arm_add_dynreloc (bfd
*output_bfd
, struct bfd_link_info
*info
,
7390 asection
*sreloc
, Elf_Internal_Rela
*rel
)
7393 struct elf32_arm_link_hash_table
*htab
;
7395 htab
= elf32_arm_hash_table (info
);
7396 if (!htab
->root
.dynamic_sections_created
7397 && ELF32_R_TYPE (rel
->r_info
) == R_ARM_IRELATIVE
)
7398 sreloc
= htab
->root
.irelplt
;
7401 loc
= sreloc
->contents
;
7402 loc
+= sreloc
->reloc_count
++ * RELOC_SIZE (htab
);
7403 if (sreloc
->reloc_count
* RELOC_SIZE (htab
) > sreloc
->size
)
7405 SWAP_RELOC_OUT (htab
) (output_bfd
, rel
, loc
);
7408 /* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT.
7409 IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than
7413 elf32_arm_allocate_plt_entry (struct bfd_link_info
*info
,
7414 bfd_boolean is_iplt_entry
,
7415 union gotplt_union
*root_plt
,
7416 struct arm_plt_info
*arm_plt
)
7418 struct elf32_arm_link_hash_table
*htab
;
7422 htab
= elf32_arm_hash_table (info
);
7426 splt
= htab
->root
.iplt
;
7427 sgotplt
= htab
->root
.igotplt
;
7429 /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */
7430 elf32_arm_allocate_irelocs (info
, htab
->root
.irelplt
, 1);
7434 splt
= htab
->root
.splt
;
7435 sgotplt
= htab
->root
.sgotplt
;
7437 /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */
7438 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
7440 /* If this is the first .plt entry, make room for the special
7442 if (splt
->size
== 0)
7443 splt
->size
+= htab
->plt_header_size
;
7446 /* Allocate the PLT entry itself, including any leading Thumb stub. */
7447 if (elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
))
7448 splt
->size
+= PLT_THUMB_STUB_SIZE
;
7449 root_plt
->offset
= splt
->size
;
7450 splt
->size
+= htab
->plt_entry_size
;
7452 if (!htab
->symbian_p
)
7454 /* We also need to make an entry in the .got.plt section, which
7455 will be placed in the .got section by the linker script. */
7456 arm_plt
->got_offset
= sgotplt
->size
- 8 * htab
->num_tls_desc
;
7462 arm_movw_immediate (bfd_vma value
)
7464 return (value
& 0x00000fff) | ((value
& 0x0000f000) << 4);
7468 arm_movt_immediate (bfd_vma value
)
7470 return ((value
& 0x0fff0000) >> 16) | ((value
& 0xf0000000) >> 12);
7473 /* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1,
7474 the entry lives in .iplt and resolves to (*SYM_VALUE)().
7475 Otherwise, DYNINDX is the index of the symbol in the dynamic
7476 symbol table and SYM_VALUE is undefined.
7478 ROOT_PLT points to the offset of the PLT entry from the start of its
7479 section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific
7480 bookkeeping information. */
7483 elf32_arm_populate_plt_entry (bfd
*output_bfd
, struct bfd_link_info
*info
,
7484 union gotplt_union
*root_plt
,
7485 struct arm_plt_info
*arm_plt
,
7486 int dynindx
, bfd_vma sym_value
)
7488 struct elf32_arm_link_hash_table
*htab
;
7494 Elf_Internal_Rela rel
;
7495 bfd_vma plt_header_size
;
7496 bfd_vma got_header_size
;
7498 htab
= elf32_arm_hash_table (info
);
7500 /* Pick the appropriate sections and sizes. */
7503 splt
= htab
->root
.iplt
;
7504 sgot
= htab
->root
.igotplt
;
7505 srel
= htab
->root
.irelplt
;
7507 /* There are no reserved entries in .igot.plt, and no special
7508 first entry in .iplt. */
7509 got_header_size
= 0;
7510 plt_header_size
= 0;
7514 splt
= htab
->root
.splt
;
7515 sgot
= htab
->root
.sgotplt
;
7516 srel
= htab
->root
.srelplt
;
7518 got_header_size
= get_elf_backend_data (output_bfd
)->got_header_size
;
7519 plt_header_size
= htab
->plt_header_size
;
7521 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
7523 /* Fill in the entry in the procedure linkage table. */
7524 if (htab
->symbian_p
)
7526 BFD_ASSERT (dynindx
>= 0);
7527 put_arm_insn (htab
, output_bfd
,
7528 elf32_arm_symbian_plt_entry
[0],
7529 splt
->contents
+ root_plt
->offset
);
7530 bfd_put_32 (output_bfd
,
7531 elf32_arm_symbian_plt_entry
[1],
7532 splt
->contents
+ root_plt
->offset
+ 4);
7534 /* Fill in the entry in the .rel.plt section. */
7535 rel
.r_offset
= (splt
->output_section
->vma
7536 + splt
->output_offset
7537 + root_plt
->offset
+ 4);
7538 rel
.r_info
= ELF32_R_INFO (dynindx
, R_ARM_GLOB_DAT
);
7540 /* Get the index in the procedure linkage table which
7541 corresponds to this symbol. This is the index of this symbol
7542 in all the symbols for which we are making plt entries. The
7543 first entry in the procedure linkage table is reserved. */
7544 plt_index
= ((root_plt
->offset
- plt_header_size
)
7545 / htab
->plt_entry_size
);
7549 bfd_vma got_offset
, got_address
, plt_address
;
7550 bfd_vma got_displacement
, initial_got_entry
;
7553 BFD_ASSERT (sgot
!= NULL
);
7555 /* Get the offset into the .(i)got.plt table of the entry that
7556 corresponds to this function. */
7557 got_offset
= (arm_plt
->got_offset
& -2);
7559 /* Get the index in the procedure linkage table which
7560 corresponds to this symbol. This is the index of this symbol
7561 in all the symbols for which we are making plt entries.
7562 After the reserved .got.plt entries, all symbols appear in
7563 the same order as in .plt. */
7564 plt_index
= (got_offset
- got_header_size
) / 4;
7566 /* Calculate the address of the GOT entry. */
7567 got_address
= (sgot
->output_section
->vma
7568 + sgot
->output_offset
7571 /* ...and the address of the PLT entry. */
7572 plt_address
= (splt
->output_section
->vma
7573 + splt
->output_offset
7574 + root_plt
->offset
);
7576 ptr
= splt
->contents
+ root_plt
->offset
;
7577 if (htab
->vxworks_p
&& info
->shared
)
7582 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
7584 val
= elf32_arm_vxworks_shared_plt_entry
[i
];
7586 val
|= got_address
- sgot
->output_section
->vma
;
7588 val
|= plt_index
* RELOC_SIZE (htab
);
7589 if (i
== 2 || i
== 5)
7590 bfd_put_32 (output_bfd
, val
, ptr
);
7592 put_arm_insn (htab
, output_bfd
, val
, ptr
);
7595 else if (htab
->vxworks_p
)
7600 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
7602 val
= elf32_arm_vxworks_exec_plt_entry
[i
];
7606 val
|= 0xffffff & -((root_plt
->offset
+ i
* 4 + 8) >> 2);
7608 val
|= plt_index
* RELOC_SIZE (htab
);
7609 if (i
== 2 || i
== 5)
7610 bfd_put_32 (output_bfd
, val
, ptr
);
7612 put_arm_insn (htab
, output_bfd
, val
, ptr
);
7615 loc
= (htab
->srelplt2
->contents
7616 + (plt_index
* 2 + 1) * RELOC_SIZE (htab
));
7618 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
7619 referencing the GOT for this PLT entry. */
7620 rel
.r_offset
= plt_address
+ 8;
7621 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
7622 rel
.r_addend
= got_offset
;
7623 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7624 loc
+= RELOC_SIZE (htab
);
7626 /* Create the R_ARM_ABS32 relocation referencing the
7627 beginning of the PLT for this GOT entry. */
7628 rel
.r_offset
= got_address
;
7629 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
7631 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7633 else if (htab
->nacl_p
)
7635 /* Calculate the displacement between the PLT slot and the
7636 common tail that's part of the special initial PLT slot. */
7637 int32_t tail_displacement
7638 = ((splt
->output_section
->vma
+ splt
->output_offset
7639 + ARM_NACL_PLT_TAIL_OFFSET
)
7640 - (plt_address
+ htab
->plt_entry_size
+ 4));
7641 BFD_ASSERT ((tail_displacement
& 3) == 0);
7642 tail_displacement
>>= 2;
7644 BFD_ASSERT ((tail_displacement
& 0xff000000) == 0
7645 || (-tail_displacement
& 0xff000000) == 0);
7647 /* Calculate the displacement between the PLT slot and the entry
7648 in the GOT. The offset accounts for the value produced by
7649 adding to pc in the penultimate instruction of the PLT stub. */
7650 got_displacement
= (got_address
7651 - (plt_address
+ htab
->plt_entry_size
));
7653 /* NaCl does not support interworking at all. */
7654 BFD_ASSERT (!elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
));
7656 put_arm_insn (htab
, output_bfd
,
7657 elf32_arm_nacl_plt_entry
[0]
7658 | arm_movw_immediate (got_displacement
),
7660 put_arm_insn (htab
, output_bfd
,
7661 elf32_arm_nacl_plt_entry
[1]
7662 | arm_movt_immediate (got_displacement
),
7664 put_arm_insn (htab
, output_bfd
,
7665 elf32_arm_nacl_plt_entry
[2],
7667 put_arm_insn (htab
, output_bfd
,
7668 elf32_arm_nacl_plt_entry
[3]
7669 | (tail_displacement
& 0x00ffffff),
7674 /* Calculate the displacement between the PLT slot and the
7675 entry in the GOT. The eight-byte offset accounts for the
7676 value produced by adding to pc in the first instruction
7678 got_displacement
= got_address
- (plt_address
+ 8);
7680 BFD_ASSERT ((got_displacement
& 0xf0000000) == 0);
7682 if (elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
))
7684 put_thumb_insn (htab
, output_bfd
,
7685 elf32_arm_plt_thumb_stub
[0], ptr
- 4);
7686 put_thumb_insn (htab
, output_bfd
,
7687 elf32_arm_plt_thumb_stub
[1], ptr
- 2);
7690 put_arm_insn (htab
, output_bfd
,
7691 elf32_arm_plt_entry
[0]
7692 | ((got_displacement
& 0x0ff00000) >> 20),
7694 put_arm_insn (htab
, output_bfd
,
7695 elf32_arm_plt_entry
[1]
7696 | ((got_displacement
& 0x000ff000) >> 12),
7698 put_arm_insn (htab
, output_bfd
,
7699 elf32_arm_plt_entry
[2]
7700 | (got_displacement
& 0x00000fff),
7702 #ifdef FOUR_WORD_PLT
7703 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[3], ptr
+ 12);
7707 /* Fill in the entry in the .rel(a).(i)plt section. */
7708 rel
.r_offset
= got_address
;
7712 /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE.
7713 The dynamic linker or static executable then calls SYM_VALUE
7714 to determine the correct run-time value of the .igot.plt entry. */
7715 rel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
7716 initial_got_entry
= sym_value
;
7720 rel
.r_info
= ELF32_R_INFO (dynindx
, R_ARM_JUMP_SLOT
);
7721 initial_got_entry
= (splt
->output_section
->vma
7722 + splt
->output_offset
);
7725 /* Fill in the entry in the global offset table. */
7726 bfd_put_32 (output_bfd
, initial_got_entry
,
7727 sgot
->contents
+ got_offset
);
7730 loc
= srel
->contents
+ plt_index
* RELOC_SIZE (htab
);
7731 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7734 /* Some relocations map to different relocations depending on the
7735 target. Return the real relocation. */
7738 arm_real_reloc_type (struct elf32_arm_link_hash_table
* globals
,
7744 if (globals
->target1_is_rel
)
7750 return globals
->target2_reloc
;
7757 /* Return the base VMA address which should be subtracted from real addresses
7758 when resolving @dtpoff relocation.
7759 This is PT_TLS segment p_vaddr. */
7762 dtpoff_base (struct bfd_link_info
*info
)
7764 /* If tls_sec is NULL, we should have signalled an error already. */
7765 if (elf_hash_table (info
)->tls_sec
== NULL
)
7767 return elf_hash_table (info
)->tls_sec
->vma
;
7770 /* Return the relocation value for @tpoff relocation
7771 if STT_TLS virtual address is ADDRESS. */
7774 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
7776 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7779 /* If tls_sec is NULL, we should have signalled an error already. */
7780 if (htab
->tls_sec
== NULL
)
7782 base
= align_power ((bfd_vma
) TCB_SIZE
, htab
->tls_sec
->alignment_power
);
7783 return address
- htab
->tls_sec
->vma
+ base
;
7786 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
7787 VALUE is the relocation value. */
7789 static bfd_reloc_status_type
7790 elf32_arm_abs12_reloc (bfd
*abfd
, void *data
, bfd_vma value
)
7793 return bfd_reloc_overflow
;
7795 value
|= bfd_get_32 (abfd
, data
) & 0xfffff000;
7796 bfd_put_32 (abfd
, value
, data
);
7797 return bfd_reloc_ok
;
7800 /* Handle TLS relaxations. Relaxing is possible for symbols that use
7801 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
7802 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
7804 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
7805 is to then call final_link_relocate. Return other values in the
7808 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
7809 the pre-relaxed code. It would be nice if the relocs were updated
7810 to match the optimization. */
7812 static bfd_reloc_status_type
7813 elf32_arm_tls_relax (struct elf32_arm_link_hash_table
*globals
,
7814 bfd
*input_bfd
, asection
*input_sec
, bfd_byte
*contents
,
7815 Elf_Internal_Rela
*rel
, unsigned long is_local
)
7819 switch (ELF32_R_TYPE (rel
->r_info
))
7822 return bfd_reloc_notsupported
;
7824 case R_ARM_TLS_GOTDESC
:
7829 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
7831 insn
-= 5; /* THUMB */
7833 insn
-= 8; /* ARM */
7835 bfd_put_32 (input_bfd
, insn
, contents
+ rel
->r_offset
);
7836 return bfd_reloc_continue
;
7838 case R_ARM_THM_TLS_DESCSEQ
:
7840 insn
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
);
7841 if ((insn
& 0xff78) == 0x4478) /* add rx, pc */
7845 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7847 else if ((insn
& 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
7851 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7854 bfd_put_16 (input_bfd
, insn
& 0xf83f, contents
+ rel
->r_offset
);
7856 else if ((insn
& 0xff87) == 0x4780) /* blx rx */
7860 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7863 bfd_put_16 (input_bfd
, 0x4600 | (insn
& 0x78),
7864 contents
+ rel
->r_offset
);
7868 if ((insn
& 0xf000) == 0xf000 || (insn
& 0xf800) == 0xe800)
7869 /* It's a 32 bit instruction, fetch the rest of it for
7870 error generation. */
7872 | bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 2);
7873 (*_bfd_error_handler
)
7874 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' in TLS trampoline"),
7875 input_bfd
, input_sec
, (unsigned long)rel
->r_offset
, insn
);
7876 return bfd_reloc_notsupported
;
7880 case R_ARM_TLS_DESCSEQ
:
7882 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
7883 if ((insn
& 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
7887 bfd_put_32 (input_bfd
, 0xe1a00000 | (insn
& 0xffff),
7888 contents
+ rel
->r_offset
);
7890 else if ((insn
& 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
7894 bfd_put_32 (input_bfd
, 0xe1a00000, contents
+ rel
->r_offset
);
7897 bfd_put_32 (input_bfd
, insn
& 0xfffff000,
7898 contents
+ rel
->r_offset
);
7900 else if ((insn
& 0xfffffff0) == 0xe12fff30) /* blx rx */
7904 bfd_put_32 (input_bfd
, 0xe1a00000, contents
+ rel
->r_offset
);
7907 bfd_put_32 (input_bfd
, 0xe1a00000 | (insn
& 0xf),
7908 contents
+ rel
->r_offset
);
7912 (*_bfd_error_handler
)
7913 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' in TLS trampoline"),
7914 input_bfd
, input_sec
, (unsigned long)rel
->r_offset
, insn
);
7915 return bfd_reloc_notsupported
;
7919 case R_ARM_TLS_CALL
:
7920 /* GD->IE relaxation, turn the instruction into 'nop' or
7921 'ldr r0, [pc,r0]' */
7922 insn
= is_local
? 0xe1a00000 : 0xe79f0000;
7923 bfd_put_32 (input_bfd
, insn
, contents
+ rel
->r_offset
);
7926 case R_ARM_THM_TLS_CALL
:
7927 /* GD->IE relaxation */
7929 /* add r0,pc; ldr r0, [r0] */
7931 else if (arch_has_thumb2_nop (globals
))
7938 bfd_put_16 (input_bfd
, insn
>> 16, contents
+ rel
->r_offset
);
7939 bfd_put_16 (input_bfd
, insn
& 0xffff, contents
+ rel
->r_offset
+ 2);
7942 return bfd_reloc_ok
;
7945 /* For a given value of n, calculate the value of G_n as required to
7946 deal with group relocations. We return it in the form of an
7947 encoded constant-and-rotation, together with the final residual. If n is
7948 specified as less than zero, then final_residual is filled with the
7949 input value and no further action is performed. */
7952 calculate_group_reloc_mask (bfd_vma value
, int n
, bfd_vma
*final_residual
)
7956 bfd_vma encoded_g_n
= 0;
7957 bfd_vma residual
= value
; /* Also known as Y_n. */
7959 for (current_n
= 0; current_n
<= n
; current_n
++)
7963 /* Calculate which part of the value to mask. */
7970 /* Determine the most significant bit in the residual and
7971 align the resulting value to a 2-bit boundary. */
7972 for (msb
= 30; msb
>= 0; msb
-= 2)
7973 if (residual
& (3 << msb
))
7976 /* The desired shift is now (msb - 6), or zero, whichever
7983 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
7984 g_n
= residual
& (0xff << shift
);
7985 encoded_g_n
= (g_n
>> shift
)
7986 | ((g_n
<= 0xff ? 0 : (32 - shift
) / 2) << 8);
7988 /* Calculate the residual for the next time around. */
7992 *final_residual
= residual
;
7997 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
7998 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
8001 identify_add_or_sub (bfd_vma insn
)
8003 int opcode
= insn
& 0x1e00000;
8005 if (opcode
== 1 << 23) /* ADD */
8008 if (opcode
== 1 << 22) /* SUB */
8014 /* Perform a relocation as part of a final link. */
8016 static bfd_reloc_status_type
8017 elf32_arm_final_link_relocate (reloc_howto_type
* howto
,
8020 asection
* input_section
,
8021 bfd_byte
* contents
,
8022 Elf_Internal_Rela
* rel
,
8024 struct bfd_link_info
* info
,
8026 const char * sym_name
,
8027 unsigned char st_type
,
8028 enum arm_st_branch_type branch_type
,
8029 struct elf_link_hash_entry
* h
,
8030 bfd_boolean
* unresolved_reloc_p
,
8031 char ** error_message
)
8033 unsigned long r_type
= howto
->type
;
8034 unsigned long r_symndx
;
8035 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
8036 bfd_vma
* local_got_offsets
;
8037 bfd_vma
* local_tlsdesc_gotents
;
8040 asection
* sreloc
= NULL
;
8043 bfd_signed_vma signed_addend
;
8044 unsigned char dynreloc_st_type
;
8045 bfd_vma dynreloc_value
;
8046 struct elf32_arm_link_hash_table
* globals
;
8047 struct elf32_arm_link_hash_entry
*eh
;
8048 union gotplt_union
*root_plt
;
8049 struct arm_plt_info
*arm_plt
;
8051 bfd_vma gotplt_offset
;
8052 bfd_boolean has_iplt_entry
;
8054 globals
= elf32_arm_hash_table (info
);
8055 if (globals
== NULL
)
8056 return bfd_reloc_notsupported
;
8058 BFD_ASSERT (is_arm_elf (input_bfd
));
8060 /* Some relocation types map to different relocations depending on the
8061 target. We pick the right one here. */
8062 r_type
= arm_real_reloc_type (globals
, r_type
);
8064 /* It is possible to have linker relaxations on some TLS access
8065 models. Update our information here. */
8066 r_type
= elf32_arm_tls_transition (info
, r_type
, h
);
8068 if (r_type
!= howto
->type
)
8069 howto
= elf32_arm_howto_from_type (r_type
);
8071 /* If the start address has been set, then set the EF_ARM_HASENTRY
8072 flag. Setting this more than once is redundant, but the cost is
8073 not too high, and it keeps the code simple.
8075 The test is done here, rather than somewhere else, because the
8076 start address is only set just before the final link commences.
8078 Note - if the user deliberately sets a start address of 0, the
8079 flag will not be set. */
8080 if (bfd_get_start_address (output_bfd
) != 0)
8081 elf_elfheader (output_bfd
)->e_flags
|= EF_ARM_HASENTRY
;
8083 eh
= (struct elf32_arm_link_hash_entry
*) h
;
8084 sgot
= globals
->root
.sgot
;
8085 local_got_offsets
= elf_local_got_offsets (input_bfd
);
8086 local_tlsdesc_gotents
= elf32_arm_local_tlsdesc_gotent (input_bfd
);
8088 if (globals
->root
.dynamic_sections_created
)
8089 srelgot
= globals
->root
.srelgot
;
8093 r_symndx
= ELF32_R_SYM (rel
->r_info
);
8095 if (globals
->use_rel
)
8097 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
8099 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8102 signed_addend
&= ~ howto
->src_mask
;
8103 signed_addend
|= addend
;
8106 signed_addend
= addend
;
8109 addend
= signed_addend
= rel
->r_addend
;
8111 /* Record the symbol information that should be used in dynamic
8113 dynreloc_st_type
= st_type
;
8114 dynreloc_value
= value
;
8115 if (branch_type
== ST_BRANCH_TO_THUMB
)
8116 dynreloc_value
|= 1;
8118 /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and
8119 VALUE appropriately for relocations that we resolve at link time. */
8120 has_iplt_entry
= FALSE
;
8121 if (elf32_arm_get_plt_info (input_bfd
, eh
, r_symndx
, &root_plt
, &arm_plt
)
8122 && root_plt
->offset
!= (bfd_vma
) -1)
8124 plt_offset
= root_plt
->offset
;
8125 gotplt_offset
= arm_plt
->got_offset
;
8127 if (h
== NULL
|| eh
->is_iplt
)
8129 has_iplt_entry
= TRUE
;
8130 splt
= globals
->root
.iplt
;
8132 /* Populate .iplt entries here, because not all of them will
8133 be seen by finish_dynamic_symbol. The lower bit is set if
8134 we have already populated the entry. */
8139 elf32_arm_populate_plt_entry (output_bfd
, info
, root_plt
, arm_plt
,
8140 -1, dynreloc_value
);
8141 root_plt
->offset
|= 1;
8144 /* Static relocations always resolve to the .iplt entry. */
8146 value
= (splt
->output_section
->vma
8147 + splt
->output_offset
8149 branch_type
= ST_BRANCH_TO_ARM
;
8151 /* If there are non-call relocations that resolve to the .iplt
8152 entry, then all dynamic ones must too. */
8153 if (arm_plt
->noncall_refcount
!= 0)
8155 dynreloc_st_type
= st_type
;
8156 dynreloc_value
= value
;
8160 /* We populate the .plt entry in finish_dynamic_symbol. */
8161 splt
= globals
->root
.splt
;
8166 plt_offset
= (bfd_vma
) -1;
8167 gotplt_offset
= (bfd_vma
) -1;
8173 /* We don't need to find a value for this symbol. It's just a
8175 *unresolved_reloc_p
= FALSE
;
8176 return bfd_reloc_ok
;
8179 if (!globals
->vxworks_p
)
8180 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
8184 case R_ARM_ABS32_NOI
:
8186 case R_ARM_REL32_NOI
:
8192 /* Handle relocations which should use the PLT entry. ABS32/REL32
8193 will use the symbol's value, which may point to a PLT entry, but we
8194 don't need to handle that here. If we created a PLT entry, all
8195 branches in this object should go to it, except if the PLT is too
8196 far away, in which case a long branch stub should be inserted. */
8197 if ((r_type
!= R_ARM_ABS32
&& r_type
!= R_ARM_REL32
8198 && r_type
!= R_ARM_ABS32_NOI
&& r_type
!= R_ARM_REL32_NOI
8199 && r_type
!= R_ARM_CALL
8200 && r_type
!= R_ARM_JUMP24
8201 && r_type
!= R_ARM_PLT32
)
8202 && plt_offset
!= (bfd_vma
) -1)
8204 /* If we've created a .plt section, and assigned a PLT entry
8205 to this function, it must either be a STT_GNU_IFUNC reference
8206 or not be known to bind locally. In other cases, we should
8207 have cleared the PLT entry by now. */
8208 BFD_ASSERT (has_iplt_entry
|| !SYMBOL_CALLS_LOCAL (info
, h
));
8210 value
= (splt
->output_section
->vma
8211 + splt
->output_offset
8213 *unresolved_reloc_p
= FALSE
;
8214 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8215 contents
, rel
->r_offset
, value
,
8219 /* When generating a shared object or relocatable executable, these
8220 relocations are copied into the output file to be resolved at
8222 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
8223 && (input_section
->flags
& SEC_ALLOC
)
8224 && !(globals
->vxworks_p
8225 && strcmp (input_section
->output_section
->name
,
8227 && ((r_type
!= R_ARM_REL32
&& r_type
!= R_ARM_REL32_NOI
)
8228 || !SYMBOL_CALLS_LOCAL (info
, h
))
8229 && (!strstr (input_section
->name
, STUB_SUFFIX
))
8231 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8232 || h
->root
.type
!= bfd_link_hash_undefweak
)
8233 && r_type
!= R_ARM_PC24
8234 && r_type
!= R_ARM_CALL
8235 && r_type
!= R_ARM_JUMP24
8236 && r_type
!= R_ARM_PREL31
8237 && r_type
!= R_ARM_PLT32
)
8239 Elf_Internal_Rela outrel
;
8240 bfd_boolean skip
, relocate
;
8242 *unresolved_reloc_p
= FALSE
;
8244 if (sreloc
== NULL
&& globals
->root
.dynamic_sections_created
)
8246 sreloc
= _bfd_elf_get_dynamic_reloc_section (input_bfd
, input_section
,
8247 ! globals
->use_rel
);
8250 return bfd_reloc_notsupported
;
8256 outrel
.r_addend
= addend
;
8258 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
8260 if (outrel
.r_offset
== (bfd_vma
) -1)
8262 else if (outrel
.r_offset
== (bfd_vma
) -2)
8263 skip
= TRUE
, relocate
= TRUE
;
8264 outrel
.r_offset
+= (input_section
->output_section
->vma
8265 + input_section
->output_offset
);
8268 memset (&outrel
, 0, sizeof outrel
);
8273 || !h
->def_regular
))
8274 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
8279 /* This symbol is local, or marked to become local. */
8280 BFD_ASSERT (r_type
== R_ARM_ABS32
|| r_type
== R_ARM_ABS32_NOI
);
8281 if (globals
->symbian_p
)
8285 /* On Symbian OS, the data segment and text segement
8286 can be relocated independently. Therefore, we
8287 must indicate the segment to which this
8288 relocation is relative. The BPABI allows us to
8289 use any symbol in the right segment; we just use
8290 the section symbol as it is convenient. (We
8291 cannot use the symbol given by "h" directly as it
8292 will not appear in the dynamic symbol table.)
8294 Note that the dynamic linker ignores the section
8295 symbol value, so we don't subtract osec->vma
8296 from the emitted reloc addend. */
8298 osec
= sym_sec
->output_section
;
8300 osec
= input_section
->output_section
;
8301 symbol
= elf_section_data (osec
)->dynindx
;
8304 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
8306 if ((osec
->flags
& SEC_READONLY
) == 0
8307 && htab
->data_index_section
!= NULL
)
8308 osec
= htab
->data_index_section
;
8310 osec
= htab
->text_index_section
;
8311 symbol
= elf_section_data (osec
)->dynindx
;
8313 BFD_ASSERT (symbol
!= 0);
8316 /* On SVR4-ish systems, the dynamic loader cannot
8317 relocate the text and data segments independently,
8318 so the symbol does not matter. */
8320 if (dynreloc_st_type
== STT_GNU_IFUNC
)
8321 /* We have an STT_GNU_IFUNC symbol that doesn't resolve
8322 to the .iplt entry. Instead, every non-call reference
8323 must use an R_ARM_IRELATIVE relocation to obtain the
8324 correct run-time address. */
8325 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_IRELATIVE
);
8327 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_RELATIVE
);
8328 if (globals
->use_rel
)
8331 outrel
.r_addend
+= dynreloc_value
;
8334 elf32_arm_add_dynreloc (output_bfd
, info
, sreloc
, &outrel
);
8336 /* If this reloc is against an external symbol, we do not want to
8337 fiddle with the addend. Otherwise, we need to include the symbol
8338 value so that it becomes an addend for the dynamic reloc. */
8340 return bfd_reloc_ok
;
8342 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8343 contents
, rel
->r_offset
,
8344 dynreloc_value
, (bfd_vma
) 0);
8346 else switch (r_type
)
8349 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
8351 case R_ARM_XPC25
: /* Arm BLX instruction. */
8354 case R_ARM_PC24
: /* Arm B/BL instruction. */
8357 struct elf32_arm_stub_hash_entry
*stub_entry
= NULL
;
8359 if (r_type
== R_ARM_XPC25
)
8361 /* Check for Arm calling Arm function. */
8362 /* FIXME: Should we translate the instruction into a BL
8363 instruction instead ? */
8364 if (branch_type
!= ST_BRANCH_TO_THUMB
)
8365 (*_bfd_error_handler
)
8366 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
8368 h
? h
->root
.root
.string
: "(local)");
8370 else if (r_type
== R_ARM_PC24
)
8372 /* Check for Arm calling Thumb function. */
8373 if (branch_type
== ST_BRANCH_TO_THUMB
)
8375 if (elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
,
8376 output_bfd
, input_section
,
8377 hit_data
, sym_sec
, rel
->r_offset
,
8378 signed_addend
, value
,
8380 return bfd_reloc_ok
;
8382 return bfd_reloc_dangerous
;
8386 /* Check if a stub has to be inserted because the
8387 destination is too far or we are changing mode. */
8388 if ( r_type
== R_ARM_CALL
8389 || r_type
== R_ARM_JUMP24
8390 || r_type
== R_ARM_PLT32
)
8392 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
8393 struct elf32_arm_link_hash_entry
*hash
;
8395 hash
= (struct elf32_arm_link_hash_entry
*) h
;
8396 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
8397 st_type
, &branch_type
,
8398 hash
, value
, sym_sec
,
8399 input_bfd
, sym_name
);
8401 if (stub_type
!= arm_stub_none
)
8403 /* The target is out of reach, so redirect the
8404 branch to the local stub for this function. */
8405 stub_entry
= elf32_arm_get_stub_entry (input_section
,
8410 if (stub_entry
!= NULL
)
8411 value
= (stub_entry
->stub_offset
8412 + stub_entry
->stub_sec
->output_offset
8413 + stub_entry
->stub_sec
->output_section
->vma
);
8415 if (plt_offset
!= (bfd_vma
) -1)
8416 *unresolved_reloc_p
= FALSE
;
8421 /* If the call goes through a PLT entry, make sure to
8422 check distance to the right destination address. */
8423 if (plt_offset
!= (bfd_vma
) -1)
8425 value
= (splt
->output_section
->vma
8426 + splt
->output_offset
8428 *unresolved_reloc_p
= FALSE
;
8429 /* The PLT entry is in ARM mode, regardless of the
8431 branch_type
= ST_BRANCH_TO_ARM
;
8436 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
8438 S is the address of the symbol in the relocation.
8439 P is address of the instruction being relocated.
8440 A is the addend (extracted from the instruction) in bytes.
8442 S is held in 'value'.
8443 P is the base address of the section containing the
8444 instruction plus the offset of the reloc into that
8446 (input_section->output_section->vma +
8447 input_section->output_offset +
8449 A is the addend, converted into bytes, ie:
8452 Note: None of these operations have knowledge of the pipeline
8453 size of the processor, thus it is up to the assembler to
8454 encode this information into the addend. */
8455 value
-= (input_section
->output_section
->vma
8456 + input_section
->output_offset
);
8457 value
-= rel
->r_offset
;
8458 if (globals
->use_rel
)
8459 value
+= (signed_addend
<< howto
->size
);
8461 /* RELA addends do not have to be adjusted by howto->size. */
8462 value
+= signed_addend
;
8464 signed_addend
= value
;
8465 signed_addend
>>= howto
->rightshift
;
8467 /* A branch to an undefined weak symbol is turned into a jump to
8468 the next instruction unless a PLT entry will be created.
8469 Do the same for local undefined symbols (but not for STN_UNDEF).
8470 The jump to the next instruction is optimized as a NOP depending
8471 on the architecture. */
8472 if (h
? (h
->root
.type
== bfd_link_hash_undefweak
8473 && plt_offset
== (bfd_vma
) -1)
8474 : r_symndx
!= STN_UNDEF
&& bfd_is_und_section (sym_sec
))
8476 value
= (bfd_get_32 (input_bfd
, hit_data
) & 0xf0000000);
8478 if (arch_has_arm_nop (globals
))
8479 value
|= 0x0320f000;
8481 value
|= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
8485 /* Perform a signed range check. */
8486 if ( signed_addend
> ((bfd_signed_vma
) (howto
->dst_mask
>> 1))
8487 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
8488 return bfd_reloc_overflow
;
8490 addend
= (value
& 2);
8492 value
= (signed_addend
& howto
->dst_mask
)
8493 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
8495 if (r_type
== R_ARM_CALL
)
8497 /* Set the H bit in the BLX instruction. */
8498 if (branch_type
== ST_BRANCH_TO_THUMB
)
8503 value
&= ~(bfd_vma
)(1 << 24);
8506 /* Select the correct instruction (BL or BLX). */
8507 /* Only if we are not handling a BL to a stub. In this
8508 case, mode switching is performed by the stub. */
8509 if (branch_type
== ST_BRANCH_TO_THUMB
&& !stub_entry
)
8511 else if (stub_entry
|| branch_type
!= ST_BRANCH_UNKNOWN
)
8513 value
&= ~(bfd_vma
)(1 << 28);
8523 if (branch_type
== ST_BRANCH_TO_THUMB
)
8527 case R_ARM_ABS32_NOI
:
8533 if (branch_type
== ST_BRANCH_TO_THUMB
)
8535 value
-= (input_section
->output_section
->vma
8536 + input_section
->output_offset
+ rel
->r_offset
);
8539 case R_ARM_REL32_NOI
:
8541 value
-= (input_section
->output_section
->vma
8542 + input_section
->output_offset
+ rel
->r_offset
);
8546 value
-= (input_section
->output_section
->vma
8547 + input_section
->output_offset
+ rel
->r_offset
);
8548 value
+= signed_addend
;
8549 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
8551 /* Check for overflow. */
8552 if ((value
^ (value
>> 1)) & (1 << 30))
8553 return bfd_reloc_overflow
;
8555 value
&= 0x7fffffff;
8556 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0x80000000);
8557 if (branch_type
== ST_BRANCH_TO_THUMB
)
8562 bfd_put_32 (input_bfd
, value
, hit_data
);
8563 return bfd_reloc_ok
;
8568 /* There is no way to tell whether the user intended to use a signed or
8569 unsigned addend. When checking for overflow we accept either,
8570 as specified by the AAELF. */
8571 if ((long) value
> 0xff || (long) value
< -0x80)
8572 return bfd_reloc_overflow
;
8574 bfd_put_8 (input_bfd
, value
, hit_data
);
8575 return bfd_reloc_ok
;
8580 /* See comment for R_ARM_ABS8. */
8581 if ((long) value
> 0xffff || (long) value
< -0x8000)
8582 return bfd_reloc_overflow
;
8584 bfd_put_16 (input_bfd
, value
, hit_data
);
8585 return bfd_reloc_ok
;
8587 case R_ARM_THM_ABS5
:
8588 /* Support ldr and str instructions for the thumb. */
8589 if (globals
->use_rel
)
8591 /* Need to refetch addend. */
8592 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
8593 /* ??? Need to determine shift amount from operand size. */
8594 addend
>>= howto
->rightshift
;
8598 /* ??? Isn't value unsigned? */
8599 if ((long) value
> 0x1f || (long) value
< -0x10)
8600 return bfd_reloc_overflow
;
8602 /* ??? Value needs to be properly shifted into place first. */
8603 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
8604 bfd_put_16 (input_bfd
, value
, hit_data
);
8605 return bfd_reloc_ok
;
8607 case R_ARM_THM_ALU_PREL_11_0
:
8608 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
8611 bfd_signed_vma relocation
;
8613 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
8614 | bfd_get_16 (input_bfd
, hit_data
+ 2);
8616 if (globals
->use_rel
)
8618 signed_addend
= (insn
& 0xff) | ((insn
& 0x7000) >> 4)
8619 | ((insn
& (1 << 26)) >> 15);
8620 if (insn
& 0xf00000)
8621 signed_addend
= -signed_addend
;
8624 relocation
= value
+ signed_addend
;
8625 relocation
-= Pa (input_section
->output_section
->vma
8626 + input_section
->output_offset
8629 value
= abs (relocation
);
8631 if (value
>= 0x1000)
8632 return bfd_reloc_overflow
;
8634 insn
= (insn
& 0xfb0f8f00) | (value
& 0xff)
8635 | ((value
& 0x700) << 4)
8636 | ((value
& 0x800) << 15);
8640 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8641 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8643 return bfd_reloc_ok
;
8647 /* PR 10073: This reloc is not generated by the GNU toolchain,
8648 but it is supported for compatibility with third party libraries
8649 generated by other compilers, specifically the ARM/IAR. */
8652 bfd_signed_vma relocation
;
8654 insn
= bfd_get_16 (input_bfd
, hit_data
);
8656 if (globals
->use_rel
)
8657 addend
= ((((insn
& 0x00ff) << 2) + 4) & 0x3ff) -4;
8659 relocation
= value
+ addend
;
8660 relocation
-= Pa (input_section
->output_section
->vma
8661 + input_section
->output_offset
8664 value
= abs (relocation
);
8666 /* We do not check for overflow of this reloc. Although strictly
8667 speaking this is incorrect, it appears to be necessary in order
8668 to work with IAR generated relocs. Since GCC and GAS do not
8669 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
8670 a problem for them. */
8673 insn
= (insn
& 0xff00) | (value
>> 2);
8675 bfd_put_16 (input_bfd
, insn
, hit_data
);
8677 return bfd_reloc_ok
;
8680 case R_ARM_THM_PC12
:
8681 /* Corresponds to: ldr.w reg, [pc, #offset]. */
8684 bfd_signed_vma relocation
;
8686 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
8687 | bfd_get_16 (input_bfd
, hit_data
+ 2);
8689 if (globals
->use_rel
)
8691 signed_addend
= insn
& 0xfff;
8692 if (!(insn
& (1 << 23)))
8693 signed_addend
= -signed_addend
;
8696 relocation
= value
+ signed_addend
;
8697 relocation
-= Pa (input_section
->output_section
->vma
8698 + input_section
->output_offset
8701 value
= abs (relocation
);
8703 if (value
>= 0x1000)
8704 return bfd_reloc_overflow
;
8706 insn
= (insn
& 0xff7ff000) | value
;
8707 if (relocation
>= 0)
8710 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8711 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8713 return bfd_reloc_ok
;
8716 case R_ARM_THM_XPC22
:
8717 case R_ARM_THM_CALL
:
8718 case R_ARM_THM_JUMP24
:
8719 /* Thumb BL (branch long instruction). */
8723 bfd_boolean overflow
= FALSE
;
8724 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
8725 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
8726 bfd_signed_vma reloc_signed_max
;
8727 bfd_signed_vma reloc_signed_min
;
8729 bfd_signed_vma signed_check
;
8731 const int thumb2
= using_thumb2 (globals
);
8733 /* A branch to an undefined weak symbol is turned into a jump to
8734 the next instruction unless a PLT entry will be created.
8735 The jump to the next instruction is optimized as a NOP.W for
8736 Thumb-2 enabled architectures. */
8737 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
8738 && plt_offset
== (bfd_vma
) -1)
8740 if (arch_has_thumb2_nop (globals
))
8742 bfd_put_16 (input_bfd
, 0xf3af, hit_data
);
8743 bfd_put_16 (input_bfd
, 0x8000, hit_data
+ 2);
8747 bfd_put_16 (input_bfd
, 0xe000, hit_data
);
8748 bfd_put_16 (input_bfd
, 0xbf00, hit_data
+ 2);
8750 return bfd_reloc_ok
;
8753 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
8754 with Thumb-1) involving the J1 and J2 bits. */
8755 if (globals
->use_rel
)
8757 bfd_vma s
= (upper_insn
& (1 << 10)) >> 10;
8758 bfd_vma upper
= upper_insn
& 0x3ff;
8759 bfd_vma lower
= lower_insn
& 0x7ff;
8760 bfd_vma j1
= (lower_insn
& (1 << 13)) >> 13;
8761 bfd_vma j2
= (lower_insn
& (1 << 11)) >> 11;
8762 bfd_vma i1
= j1
^ s
? 0 : 1;
8763 bfd_vma i2
= j2
^ s
? 0 : 1;
8765 addend
= (i1
<< 23) | (i2
<< 22) | (upper
<< 12) | (lower
<< 1);
8767 addend
= (addend
| ((s
? 0 : 1) << 24)) - (1 << 24);
8769 signed_addend
= addend
;
8772 if (r_type
== R_ARM_THM_XPC22
)
8774 /* Check for Thumb to Thumb call. */
8775 /* FIXME: Should we translate the instruction into a BL
8776 instruction instead ? */
8777 if (branch_type
== ST_BRANCH_TO_THUMB
)
8778 (*_bfd_error_handler
)
8779 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
8781 h
? h
->root
.root
.string
: "(local)");
8785 /* If it is not a call to Thumb, assume call to Arm.
8786 If it is a call relative to a section name, then it is not a
8787 function call at all, but rather a long jump. Calls through
8788 the PLT do not require stubs. */
8789 if (branch_type
== ST_BRANCH_TO_ARM
&& plt_offset
== (bfd_vma
) -1)
8791 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
8793 /* Convert BL to BLX. */
8794 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8796 else if (( r_type
!= R_ARM_THM_CALL
)
8797 && (r_type
!= R_ARM_THM_JUMP24
))
8799 if (elf32_thumb_to_arm_stub
8800 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
8801 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
,
8803 return bfd_reloc_ok
;
8805 return bfd_reloc_dangerous
;
8808 else if (branch_type
== ST_BRANCH_TO_THUMB
8810 && r_type
== R_ARM_THM_CALL
)
8812 /* Make sure this is a BL. */
8813 lower_insn
|= 0x1800;
8817 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
8818 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
8820 /* Check if a stub has to be inserted because the destination
8822 struct elf32_arm_stub_hash_entry
*stub_entry
;
8823 struct elf32_arm_link_hash_entry
*hash
;
8825 hash
= (struct elf32_arm_link_hash_entry
*) h
;
8827 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
8828 st_type
, &branch_type
,
8829 hash
, value
, sym_sec
,
8830 input_bfd
, sym_name
);
8832 if (stub_type
!= arm_stub_none
)
8834 /* The target is out of reach or we are changing modes, so
8835 redirect the branch to the local stub for this
8837 stub_entry
= elf32_arm_get_stub_entry (input_section
,
8841 if (stub_entry
!= NULL
)
8843 value
= (stub_entry
->stub_offset
8844 + stub_entry
->stub_sec
->output_offset
8845 + stub_entry
->stub_sec
->output_section
->vma
);
8847 if (plt_offset
!= (bfd_vma
) -1)
8848 *unresolved_reloc_p
= FALSE
;
8851 /* If this call becomes a call to Arm, force BLX. */
8852 if (globals
->use_blx
&& (r_type
== R_ARM_THM_CALL
))
8855 && !arm_stub_is_thumb (stub_entry
->stub_type
))
8856 || branch_type
!= ST_BRANCH_TO_THUMB
)
8857 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8862 /* Handle calls via the PLT. */
8863 if (stub_type
== arm_stub_none
&& plt_offset
!= (bfd_vma
) -1)
8865 value
= (splt
->output_section
->vma
8866 + splt
->output_offset
8869 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
8871 /* If the Thumb BLX instruction is available, convert
8872 the BL to a BLX instruction to call the ARM-mode
8874 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8875 branch_type
= ST_BRANCH_TO_ARM
;
8879 /* Target the Thumb stub before the ARM PLT entry. */
8880 value
-= PLT_THUMB_STUB_SIZE
;
8881 branch_type
= ST_BRANCH_TO_THUMB
;
8883 *unresolved_reloc_p
= FALSE
;
8886 relocation
= value
+ signed_addend
;
8888 relocation
-= (input_section
->output_section
->vma
8889 + input_section
->output_offset
8892 check
= relocation
>> howto
->rightshift
;
8894 /* If this is a signed value, the rightshift just dropped
8895 leading 1 bits (assuming twos complement). */
8896 if ((bfd_signed_vma
) relocation
>= 0)
8897 signed_check
= check
;
8899 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
8901 /* Calculate the permissable maximum and minimum values for
8902 this relocation according to whether we're relocating for
8904 bitsize
= howto
->bitsize
;
8907 reloc_signed_max
= (1 << (bitsize
- 1)) - 1;
8908 reloc_signed_min
= ~reloc_signed_max
;
8910 /* Assumes two's complement. */
8911 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
8914 if ((lower_insn
& 0x5000) == 0x4000)
8915 /* For a BLX instruction, make sure that the relocation is rounded up
8916 to a word boundary. This follows the semantics of the instruction
8917 which specifies that bit 1 of the target address will come from bit
8918 1 of the base address. */
8919 relocation
= (relocation
+ 2) & ~ 3;
8921 /* Put RELOCATION back into the insn. Assumes two's complement.
8922 We use the Thumb-2 encoding, which is safe even if dealing with
8923 a Thumb-1 instruction by virtue of our overflow check above. */
8924 reloc_sign
= (signed_check
< 0) ? 1 : 0;
8925 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff)
8926 | ((relocation
>> 12) & 0x3ff)
8927 | (reloc_sign
<< 10);
8928 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x2fff)
8929 | (((!((relocation
>> 23) & 1)) ^ reloc_sign
) << 13)
8930 | (((!((relocation
>> 22) & 1)) ^ reloc_sign
) << 11)
8931 | ((relocation
>> 1) & 0x7ff);
8933 /* Put the relocated value back in the object file: */
8934 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
8935 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
8937 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
8941 case R_ARM_THM_JUMP19
:
8942 /* Thumb32 conditional branch instruction. */
8945 bfd_boolean overflow
= FALSE
;
8946 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
8947 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
8948 bfd_signed_vma reloc_signed_max
= 0xffffe;
8949 bfd_signed_vma reloc_signed_min
= -0x100000;
8950 bfd_signed_vma signed_check
;
8952 /* Need to refetch the addend, reconstruct the top three bits,
8953 and squish the two 11 bit pieces together. */
8954 if (globals
->use_rel
)
8956 bfd_vma S
= (upper_insn
& 0x0400) >> 10;
8957 bfd_vma upper
= (upper_insn
& 0x003f);
8958 bfd_vma J1
= (lower_insn
& 0x2000) >> 13;
8959 bfd_vma J2
= (lower_insn
& 0x0800) >> 11;
8960 bfd_vma lower
= (lower_insn
& 0x07ff);
8965 upper
-= 0x0100; /* Sign extend. */
8967 addend
= (upper
<< 12) | (lower
<< 1);
8968 signed_addend
= addend
;
8971 /* Handle calls via the PLT. */
8972 if (plt_offset
!= (bfd_vma
) -1)
8974 value
= (splt
->output_section
->vma
8975 + splt
->output_offset
8977 /* Target the Thumb stub before the ARM PLT entry. */
8978 value
-= PLT_THUMB_STUB_SIZE
;
8979 *unresolved_reloc_p
= FALSE
;
8982 /* ??? Should handle interworking? GCC might someday try to
8983 use this for tail calls. */
8985 relocation
= value
+ signed_addend
;
8986 relocation
-= (input_section
->output_section
->vma
8987 + input_section
->output_offset
8989 signed_check
= (bfd_signed_vma
) relocation
;
8991 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
8994 /* Put RELOCATION back into the insn. */
8996 bfd_vma S
= (relocation
& 0x00100000) >> 20;
8997 bfd_vma J2
= (relocation
& 0x00080000) >> 19;
8998 bfd_vma J1
= (relocation
& 0x00040000) >> 18;
8999 bfd_vma hi
= (relocation
& 0x0003f000) >> 12;
9000 bfd_vma lo
= (relocation
& 0x00000ffe) >> 1;
9002 upper_insn
= (upper_insn
& 0xfbc0) | (S
<< 10) | hi
;
9003 lower_insn
= (lower_insn
& 0xd000) | (J1
<< 13) | (J2
<< 11) | lo
;
9006 /* Put the relocated value back in the object file: */
9007 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
9008 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
9010 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
9013 case R_ARM_THM_JUMP11
:
9014 case R_ARM_THM_JUMP8
:
9015 case R_ARM_THM_JUMP6
:
9016 /* Thumb B (branch) instruction). */
9018 bfd_signed_vma relocation
;
9019 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
9020 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
9021 bfd_signed_vma signed_check
;
9023 /* CZB cannot jump backward. */
9024 if (r_type
== R_ARM_THM_JUMP6
)
9025 reloc_signed_min
= 0;
9027 if (globals
->use_rel
)
9029 /* Need to refetch addend. */
9030 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
9031 if (addend
& ((howto
->src_mask
+ 1) >> 1))
9034 signed_addend
&= ~ howto
->src_mask
;
9035 signed_addend
|= addend
;
9038 signed_addend
= addend
;
9039 /* The value in the insn has been right shifted. We need to
9040 undo this, so that we can perform the address calculation
9041 in terms of bytes. */
9042 signed_addend
<<= howto
->rightshift
;
9044 relocation
= value
+ signed_addend
;
9046 relocation
-= (input_section
->output_section
->vma
9047 + input_section
->output_offset
9050 relocation
>>= howto
->rightshift
;
9051 signed_check
= relocation
;
9053 if (r_type
== R_ARM_THM_JUMP6
)
9054 relocation
= ((relocation
& 0x0020) << 4) | ((relocation
& 0x001f) << 3);
9056 relocation
&= howto
->dst_mask
;
9057 relocation
|= (bfd_get_16 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
9059 bfd_put_16 (input_bfd
, relocation
, hit_data
);
9061 /* Assumes two's complement. */
9062 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
9063 return bfd_reloc_overflow
;
9065 return bfd_reloc_ok
;
9068 case R_ARM_ALU_PCREL7_0
:
9069 case R_ARM_ALU_PCREL15_8
:
9070 case R_ARM_ALU_PCREL23_15
:
9075 insn
= bfd_get_32 (input_bfd
, hit_data
);
9076 if (globals
->use_rel
)
9078 /* Extract the addend. */
9079 addend
= (insn
& 0xff) << ((insn
& 0xf00) >> 7);
9080 signed_addend
= addend
;
9082 relocation
= value
+ signed_addend
;
9084 relocation
-= (input_section
->output_section
->vma
9085 + input_section
->output_offset
9087 insn
= (insn
& ~0xfff)
9088 | ((howto
->bitpos
<< 7) & 0xf00)
9089 | ((relocation
>> howto
->bitpos
) & 0xff);
9090 bfd_put_32 (input_bfd
, value
, hit_data
);
9092 return bfd_reloc_ok
;
9094 case R_ARM_GNU_VTINHERIT
:
9095 case R_ARM_GNU_VTENTRY
:
9096 return bfd_reloc_ok
;
9098 case R_ARM_GOTOFF32
:
9099 /* Relocation is relative to the start of the
9100 global offset table. */
9102 BFD_ASSERT (sgot
!= NULL
);
9104 return bfd_reloc_notsupported
;
9106 /* If we are addressing a Thumb function, we need to adjust the
9107 address by one, so that attempts to call the function pointer will
9108 correctly interpret it as Thumb code. */
9109 if (branch_type
== ST_BRANCH_TO_THUMB
)
9112 /* Note that sgot->output_offset is not involved in this
9113 calculation. We always want the start of .got. If we
9114 define _GLOBAL_OFFSET_TABLE in a different way, as is
9115 permitted by the ABI, we might have to change this
9117 value
-= sgot
->output_section
->vma
;
9118 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9119 contents
, rel
->r_offset
, value
,
9123 /* Use global offset table as symbol value. */
9124 BFD_ASSERT (sgot
!= NULL
);
9127 return bfd_reloc_notsupported
;
9129 *unresolved_reloc_p
= FALSE
;
9130 value
= sgot
->output_section
->vma
;
9131 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9132 contents
, rel
->r_offset
, value
,
9136 case R_ARM_GOT_PREL
:
9137 /* Relocation is to the entry for this symbol in the
9138 global offset table. */
9140 return bfd_reloc_notsupported
;
9142 if (dynreloc_st_type
== STT_GNU_IFUNC
9143 && plt_offset
!= (bfd_vma
) -1
9144 && (h
== NULL
|| SYMBOL_REFERENCES_LOCAL (info
, h
)))
9146 /* We have a relocation against a locally-binding STT_GNU_IFUNC
9147 symbol, and the relocation resolves directly to the runtime
9148 target rather than to the .iplt entry. This means that any
9149 .got entry would be the same value as the .igot.plt entry,
9150 so there's no point creating both. */
9151 sgot
= globals
->root
.igotplt
;
9152 value
= sgot
->output_offset
+ gotplt_offset
;
9158 off
= h
->got
.offset
;
9159 BFD_ASSERT (off
!= (bfd_vma
) -1);
9162 /* We have already processsed one GOT relocation against
9165 if (globals
->root
.dynamic_sections_created
9166 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
9167 *unresolved_reloc_p
= FALSE
;
9171 Elf_Internal_Rela outrel
;
9173 if (!SYMBOL_REFERENCES_LOCAL (info
, h
))
9175 /* If the symbol doesn't resolve locally in a static
9176 object, we have an undefined reference. If the
9177 symbol doesn't resolve locally in a dynamic object,
9178 it should be resolved by the dynamic linker. */
9179 if (globals
->root
.dynamic_sections_created
)
9181 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
9182 *unresolved_reloc_p
= FALSE
;
9186 outrel
.r_addend
= 0;
9190 if (dynreloc_st_type
== STT_GNU_IFUNC
)
9191 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
9192 else if (info
->shared
)
9193 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
9196 outrel
.r_addend
= dynreloc_value
;
9199 /* The GOT entry is initialized to zero by default.
9200 See if we should install a different value. */
9201 if (outrel
.r_addend
!= 0
9202 && (outrel
.r_info
== 0 || globals
->use_rel
))
9204 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9205 sgot
->contents
+ off
);
9206 outrel
.r_addend
= 0;
9209 if (outrel
.r_info
!= 0)
9211 outrel
.r_offset
= (sgot
->output_section
->vma
9212 + sgot
->output_offset
9214 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9218 value
= sgot
->output_offset
+ off
;
9224 BFD_ASSERT (local_got_offsets
!= NULL
&&
9225 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
9227 off
= local_got_offsets
[r_symndx
];
9229 /* The offset must always be a multiple of 4. We use the
9230 least significant bit to record whether we have already
9231 generated the necessary reloc. */
9236 if (globals
->use_rel
)
9237 bfd_put_32 (output_bfd
, dynreloc_value
, sgot
->contents
+ off
);
9239 if (info
->shared
|| dynreloc_st_type
== STT_GNU_IFUNC
)
9241 Elf_Internal_Rela outrel
;
9243 outrel
.r_addend
= addend
+ dynreloc_value
;
9244 outrel
.r_offset
= (sgot
->output_section
->vma
9245 + sgot
->output_offset
9247 if (dynreloc_st_type
== STT_GNU_IFUNC
)
9248 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
9250 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
9251 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9254 local_got_offsets
[r_symndx
] |= 1;
9257 value
= sgot
->output_offset
+ off
;
9259 if (r_type
!= R_ARM_GOT32
)
9260 value
+= sgot
->output_section
->vma
;
9262 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9263 contents
, rel
->r_offset
, value
,
9266 case R_ARM_TLS_LDO32
:
9267 value
= value
- dtpoff_base (info
);
9269 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9270 contents
, rel
->r_offset
, value
,
9273 case R_ARM_TLS_LDM32
:
9280 off
= globals
->tls_ldm_got
.offset
;
9286 /* If we don't know the module number, create a relocation
9290 Elf_Internal_Rela outrel
;
9292 if (srelgot
== NULL
)
9295 outrel
.r_addend
= 0;
9296 outrel
.r_offset
= (sgot
->output_section
->vma
9297 + sgot
->output_offset
+ off
);
9298 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32
);
9300 if (globals
->use_rel
)
9301 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9302 sgot
->contents
+ off
);
9304 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9307 bfd_put_32 (output_bfd
, 1, sgot
->contents
+ off
);
9309 globals
->tls_ldm_got
.offset
|= 1;
9312 value
= sgot
->output_section
->vma
+ sgot
->output_offset
+ off
9313 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
9315 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9316 contents
, rel
->r_offset
, value
,
9320 case R_ARM_TLS_CALL
:
9321 case R_ARM_THM_TLS_CALL
:
9322 case R_ARM_TLS_GD32
:
9323 case R_ARM_TLS_IE32
:
9324 case R_ARM_TLS_GOTDESC
:
9325 case R_ARM_TLS_DESCSEQ
:
9326 case R_ARM_THM_TLS_DESCSEQ
:
9328 bfd_vma off
, offplt
;
9332 BFD_ASSERT (sgot
!= NULL
);
9337 dyn
= globals
->root
.dynamic_sections_created
;
9338 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
9340 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
9342 *unresolved_reloc_p
= FALSE
;
9345 off
= h
->got
.offset
;
9346 offplt
= elf32_arm_hash_entry (h
)->tlsdesc_got
;
9347 tls_type
= ((struct elf32_arm_link_hash_entry
*) h
)->tls_type
;
9351 BFD_ASSERT (local_got_offsets
!= NULL
);
9352 off
= local_got_offsets
[r_symndx
];
9353 offplt
= local_tlsdesc_gotents
[r_symndx
];
9354 tls_type
= elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
];
9357 /* Linker relaxations happens from one of the
9358 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
9359 if (ELF32_R_TYPE(rel
->r_info
) != r_type
)
9360 tls_type
= GOT_TLS_IE
;
9362 BFD_ASSERT (tls_type
!= GOT_UNKNOWN
);
9368 bfd_boolean need_relocs
= FALSE
;
9369 Elf_Internal_Rela outrel
;
9372 /* The GOT entries have not been initialized yet. Do it
9373 now, and emit any relocations. If both an IE GOT and a
9374 GD GOT are necessary, we emit the GD first. */
9376 if ((info
->shared
|| indx
!= 0)
9378 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
9379 || h
->root
.type
!= bfd_link_hash_undefweak
))
9382 BFD_ASSERT (srelgot
!= NULL
);
9385 if (tls_type
& GOT_TLS_GDESC
)
9389 /* We should have relaxed, unless this is an undefined
9391 BFD_ASSERT ((h
&& (h
->root
.type
== bfd_link_hash_undefweak
))
9393 BFD_ASSERT (globals
->sgotplt_jump_table_size
+ offplt
+ 8
9394 <= globals
->root
.sgotplt
->size
);
9396 outrel
.r_addend
= 0;
9397 outrel
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
9398 + globals
->root
.sgotplt
->output_offset
9400 + globals
->sgotplt_jump_table_size
);
9402 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DESC
);
9403 sreloc
= globals
->root
.srelplt
;
9404 loc
= sreloc
->contents
;
9405 loc
+= globals
->next_tls_desc_index
++ * RELOC_SIZE (globals
);
9406 BFD_ASSERT (loc
+ RELOC_SIZE (globals
)
9407 <= sreloc
->contents
+ sreloc
->size
);
9409 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
9411 /* For globals, the first word in the relocation gets
9412 the relocation index and the top bit set, or zero,
9413 if we're binding now. For locals, it gets the
9414 symbol's offset in the tls section. */
9415 bfd_put_32 (output_bfd
,
9416 !h
? value
- elf_hash_table (info
)->tls_sec
->vma
9417 : info
->flags
& DF_BIND_NOW
? 0
9418 : 0x80000000 | ELF32_R_SYM (outrel
.r_info
),
9419 globals
->root
.sgotplt
->contents
+ offplt
9420 + globals
->sgotplt_jump_table_size
);
9422 /* Second word in the relocation is always zero. */
9423 bfd_put_32 (output_bfd
, 0,
9424 globals
->root
.sgotplt
->contents
+ offplt
9425 + globals
->sgotplt_jump_table_size
+ 4);
9427 if (tls_type
& GOT_TLS_GD
)
9431 outrel
.r_addend
= 0;
9432 outrel
.r_offset
= (sgot
->output_section
->vma
9433 + sgot
->output_offset
9435 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DTPMOD32
);
9437 if (globals
->use_rel
)
9438 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9439 sgot
->contents
+ cur_off
);
9441 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9444 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
9445 sgot
->contents
+ cur_off
+ 4);
9448 outrel
.r_addend
= 0;
9449 outrel
.r_info
= ELF32_R_INFO (indx
,
9450 R_ARM_TLS_DTPOFF32
);
9451 outrel
.r_offset
+= 4;
9453 if (globals
->use_rel
)
9454 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9455 sgot
->contents
+ cur_off
+ 4);
9457 elf32_arm_add_dynreloc (output_bfd
, info
,
9463 /* If we are not emitting relocations for a
9464 general dynamic reference, then we must be in a
9465 static link or an executable link with the
9466 symbol binding locally. Mark it as belonging
9467 to module 1, the executable. */
9468 bfd_put_32 (output_bfd
, 1,
9469 sgot
->contents
+ cur_off
);
9470 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
9471 sgot
->contents
+ cur_off
+ 4);
9477 if (tls_type
& GOT_TLS_IE
)
9482 outrel
.r_addend
= value
- dtpoff_base (info
);
9484 outrel
.r_addend
= 0;
9485 outrel
.r_offset
= (sgot
->output_section
->vma
9486 + sgot
->output_offset
9488 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_TPOFF32
);
9490 if (globals
->use_rel
)
9491 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9492 sgot
->contents
+ cur_off
);
9494 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9497 bfd_put_32 (output_bfd
, tpoff (info
, value
),
9498 sgot
->contents
+ cur_off
);
9505 local_got_offsets
[r_symndx
] |= 1;
9508 if ((tls_type
& GOT_TLS_GD
) && r_type
!= R_ARM_TLS_GD32
)
9510 else if (tls_type
& GOT_TLS_GDESC
)
9513 if (ELF32_R_TYPE(rel
->r_info
) == R_ARM_TLS_CALL
9514 || ELF32_R_TYPE(rel
->r_info
) == R_ARM_THM_TLS_CALL
)
9516 bfd_signed_vma offset
;
9517 /* TLS stubs are arm mode. The original symbol is a
9518 data object, so branch_type is bogus. */
9519 branch_type
= ST_BRANCH_TO_ARM
;
9520 enum elf32_arm_stub_type stub_type
9521 = arm_type_of_stub (info
, input_section
, rel
,
9522 st_type
, &branch_type
,
9523 (struct elf32_arm_link_hash_entry
*)h
,
9524 globals
->tls_trampoline
, globals
->root
.splt
,
9525 input_bfd
, sym_name
);
9527 if (stub_type
!= arm_stub_none
)
9529 struct elf32_arm_stub_hash_entry
*stub_entry
9530 = elf32_arm_get_stub_entry
9531 (input_section
, globals
->root
.splt
, 0, rel
,
9532 globals
, stub_type
);
9533 offset
= (stub_entry
->stub_offset
9534 + stub_entry
->stub_sec
->output_offset
9535 + stub_entry
->stub_sec
->output_section
->vma
);
9538 offset
= (globals
->root
.splt
->output_section
->vma
9539 + globals
->root
.splt
->output_offset
9540 + globals
->tls_trampoline
);
9542 if (ELF32_R_TYPE(rel
->r_info
) == R_ARM_TLS_CALL
)
9546 offset
-= (input_section
->output_section
->vma
9547 + input_section
->output_offset
9548 + rel
->r_offset
+ 8);
9552 value
= inst
| (globals
->use_blx
? 0xfa000000 : 0xeb000000);
9556 /* Thumb blx encodes the offset in a complicated
9558 unsigned upper_insn
, lower_insn
;
9561 offset
-= (input_section
->output_section
->vma
9562 + input_section
->output_offset
9563 + rel
->r_offset
+ 4);
9565 if (stub_type
!= arm_stub_none
9566 && arm_stub_is_thumb (stub_type
))
9568 lower_insn
= 0xd000;
9572 lower_insn
= 0xc000;
9573 /* Round up the offset to a word boundary */
9574 offset
= (offset
+ 2) & ~2;
9578 upper_insn
= (0xf000
9579 | ((offset
>> 12) & 0x3ff)
9581 lower_insn
|= (((!((offset
>> 23) & 1)) ^ neg
) << 13)
9582 | (((!((offset
>> 22) & 1)) ^ neg
) << 11)
9583 | ((offset
>> 1) & 0x7ff);
9584 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
9585 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
9586 return bfd_reloc_ok
;
9589 /* These relocations needs special care, as besides the fact
9590 they point somewhere in .gotplt, the addend must be
9591 adjusted accordingly depending on the type of instruction
9593 else if ((r_type
== R_ARM_TLS_GOTDESC
) && (tls_type
& GOT_TLS_GDESC
))
9595 unsigned long data
, insn
;
9598 data
= bfd_get_32 (input_bfd
, hit_data
);
9604 insn
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
- data
);
9605 if ((insn
& 0xf000) == 0xf000 || (insn
& 0xf800) == 0xe800)
9607 | bfd_get_16 (input_bfd
,
9608 contents
+ rel
->r_offset
- data
+ 2);
9609 if ((insn
& 0xf800c000) == 0xf000c000)
9612 else if ((insn
& 0xffffff00) == 0x4400)
9617 (*_bfd_error_handler
)
9618 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' referenced by TLS_GOTDESC"),
9619 input_bfd
, input_section
,
9620 (unsigned long)rel
->r_offset
, insn
);
9621 return bfd_reloc_notsupported
;
9626 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
- data
);
9631 case 0xfa: /* blx */
9635 case 0xe0: /* add */
9640 (*_bfd_error_handler
)
9641 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' referenced by TLS_GOTDESC"),
9642 input_bfd
, input_section
,
9643 (unsigned long)rel
->r_offset
, insn
);
9644 return bfd_reloc_notsupported
;
9648 value
+= ((globals
->root
.sgotplt
->output_section
->vma
9649 + globals
->root
.sgotplt
->output_offset
+ off
)
9650 - (input_section
->output_section
->vma
9651 + input_section
->output_offset
9653 + globals
->sgotplt_jump_table_size
);
9656 value
= ((globals
->root
.sgot
->output_section
->vma
9657 + globals
->root
.sgot
->output_offset
+ off
)
9658 - (input_section
->output_section
->vma
9659 + input_section
->output_offset
+ rel
->r_offset
));
9661 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9662 contents
, rel
->r_offset
, value
,
9666 case R_ARM_TLS_LE32
:
9667 if (info
->shared
&& !info
->pie
)
9669 (*_bfd_error_handler
)
9670 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
9671 input_bfd
, input_section
,
9672 (long) rel
->r_offset
, howto
->name
);
9673 return bfd_reloc_notsupported
;
9676 value
= tpoff (info
, value
);
9678 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9679 contents
, rel
->r_offset
, value
,
9683 if (globals
->fix_v4bx
)
9685 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9687 /* Ensure that we have a BX instruction. */
9688 BFD_ASSERT ((insn
& 0x0ffffff0) == 0x012fff10);
9690 if (globals
->fix_v4bx
== 2 && (insn
& 0xf) != 0xf)
9692 /* Branch to veneer. */
9694 glue_addr
= elf32_arm_bx_glue (info
, insn
& 0xf);
9695 glue_addr
-= input_section
->output_section
->vma
9696 + input_section
->output_offset
9697 + rel
->r_offset
+ 8;
9698 insn
= (insn
& 0xf0000000) | 0x0a000000
9699 | ((glue_addr
>> 2) & 0x00ffffff);
9703 /* Preserve Rm (lowest four bits) and the condition code
9704 (highest four bits). Other bits encode MOV PC,Rm. */
9705 insn
= (insn
& 0xf000000f) | 0x01a0f000;
9708 bfd_put_32 (input_bfd
, insn
, hit_data
);
9710 return bfd_reloc_ok
;
9712 case R_ARM_MOVW_ABS_NC
:
9713 case R_ARM_MOVT_ABS
:
9714 case R_ARM_MOVW_PREL_NC
:
9715 case R_ARM_MOVT_PREL
:
9716 /* Until we properly support segment-base-relative addressing then
9717 we assume the segment base to be zero, as for the group relocations.
9718 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
9719 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
9720 case R_ARM_MOVW_BREL_NC
:
9721 case R_ARM_MOVW_BREL
:
9722 case R_ARM_MOVT_BREL
:
9724 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9726 if (globals
->use_rel
)
9728 addend
= ((insn
>> 4) & 0xf000) | (insn
& 0xfff);
9729 signed_addend
= (addend
^ 0x8000) - 0x8000;
9732 value
+= signed_addend
;
9734 if (r_type
== R_ARM_MOVW_PREL_NC
|| r_type
== R_ARM_MOVT_PREL
)
9735 value
-= (input_section
->output_section
->vma
9736 + input_section
->output_offset
+ rel
->r_offset
);
9738 if (r_type
== R_ARM_MOVW_BREL
&& value
>= 0x10000)
9739 return bfd_reloc_overflow
;
9741 if (branch_type
== ST_BRANCH_TO_THUMB
)
9744 if (r_type
== R_ARM_MOVT_ABS
|| r_type
== R_ARM_MOVT_PREL
9745 || r_type
== R_ARM_MOVT_BREL
)
9749 insn
|= value
& 0xfff;
9750 insn
|= (value
& 0xf000) << 4;
9751 bfd_put_32 (input_bfd
, insn
, hit_data
);
9753 return bfd_reloc_ok
;
9755 case R_ARM_THM_MOVW_ABS_NC
:
9756 case R_ARM_THM_MOVT_ABS
:
9757 case R_ARM_THM_MOVW_PREL_NC
:
9758 case R_ARM_THM_MOVT_PREL
:
9759 /* Until we properly support segment-base-relative addressing then
9760 we assume the segment base to be zero, as for the above relocations.
9761 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
9762 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
9763 as R_ARM_THM_MOVT_ABS. */
9764 case R_ARM_THM_MOVW_BREL_NC
:
9765 case R_ARM_THM_MOVW_BREL
:
9766 case R_ARM_THM_MOVT_BREL
:
9770 insn
= bfd_get_16 (input_bfd
, hit_data
) << 16;
9771 insn
|= bfd_get_16 (input_bfd
, hit_data
+ 2);
9773 if (globals
->use_rel
)
9775 addend
= ((insn
>> 4) & 0xf000)
9776 | ((insn
>> 15) & 0x0800)
9777 | ((insn
>> 4) & 0x0700)
9779 signed_addend
= (addend
^ 0x8000) - 0x8000;
9782 value
+= signed_addend
;
9784 if (r_type
== R_ARM_THM_MOVW_PREL_NC
|| r_type
== R_ARM_THM_MOVT_PREL
)
9785 value
-= (input_section
->output_section
->vma
9786 + input_section
->output_offset
+ rel
->r_offset
);
9788 if (r_type
== R_ARM_THM_MOVW_BREL
&& value
>= 0x10000)
9789 return bfd_reloc_overflow
;
9791 if (branch_type
== ST_BRANCH_TO_THUMB
)
9794 if (r_type
== R_ARM_THM_MOVT_ABS
|| r_type
== R_ARM_THM_MOVT_PREL
9795 || r_type
== R_ARM_THM_MOVT_BREL
)
9799 insn
|= (value
& 0xf000) << 4;
9800 insn
|= (value
& 0x0800) << 15;
9801 insn
|= (value
& 0x0700) << 4;
9802 insn
|= (value
& 0x00ff);
9804 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
9805 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
9807 return bfd_reloc_ok
;
9809 case R_ARM_ALU_PC_G0_NC
:
9810 case R_ARM_ALU_PC_G1_NC
:
9811 case R_ARM_ALU_PC_G0
:
9812 case R_ARM_ALU_PC_G1
:
9813 case R_ARM_ALU_PC_G2
:
9814 case R_ARM_ALU_SB_G0_NC
:
9815 case R_ARM_ALU_SB_G1_NC
:
9816 case R_ARM_ALU_SB_G0
:
9817 case R_ARM_ALU_SB_G1
:
9818 case R_ARM_ALU_SB_G2
:
9820 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9821 bfd_vma pc
= input_section
->output_section
->vma
9822 + input_section
->output_offset
+ rel
->r_offset
;
9823 /* sb should be the origin of the *segment* containing the symbol.
9824 It is not clear how to obtain this OS-dependent value, so we
9825 make an arbitrary choice of zero. */
9829 bfd_signed_vma signed_value
;
9832 /* Determine which group of bits to select. */
9835 case R_ARM_ALU_PC_G0_NC
:
9836 case R_ARM_ALU_PC_G0
:
9837 case R_ARM_ALU_SB_G0_NC
:
9838 case R_ARM_ALU_SB_G0
:
9842 case R_ARM_ALU_PC_G1_NC
:
9843 case R_ARM_ALU_PC_G1
:
9844 case R_ARM_ALU_SB_G1_NC
:
9845 case R_ARM_ALU_SB_G1
:
9849 case R_ARM_ALU_PC_G2
:
9850 case R_ARM_ALU_SB_G2
:
9858 /* If REL, extract the addend from the insn. If RELA, it will
9859 have already been fetched for us. */
9860 if (globals
->use_rel
)
9863 bfd_vma constant
= insn
& 0xff;
9864 bfd_vma rotation
= (insn
& 0xf00) >> 8;
9867 signed_addend
= constant
;
9870 /* Compensate for the fact that in the instruction, the
9871 rotation is stored in multiples of 2 bits. */
9874 /* Rotate "constant" right by "rotation" bits. */
9875 signed_addend
= (constant
>> rotation
) |
9876 (constant
<< (8 * sizeof (bfd_vma
) - rotation
));
9879 /* Determine if the instruction is an ADD or a SUB.
9880 (For REL, this determines the sign of the addend.) */
9881 negative
= identify_add_or_sub (insn
);
9884 (*_bfd_error_handler
)
9885 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
9886 input_bfd
, input_section
,
9887 (long) rel
->r_offset
, howto
->name
);
9888 return bfd_reloc_overflow
;
9891 signed_addend
*= negative
;
9894 /* Compute the value (X) to go in the place. */
9895 if (r_type
== R_ARM_ALU_PC_G0_NC
9896 || r_type
== R_ARM_ALU_PC_G1_NC
9897 || r_type
== R_ARM_ALU_PC_G0
9898 || r_type
== R_ARM_ALU_PC_G1
9899 || r_type
== R_ARM_ALU_PC_G2
)
9901 signed_value
= value
- pc
+ signed_addend
;
9903 /* Section base relative. */
9904 signed_value
= value
- sb
+ signed_addend
;
9906 /* If the target symbol is a Thumb function, then set the
9907 Thumb bit in the address. */
9908 if (branch_type
== ST_BRANCH_TO_THUMB
)
9911 /* Calculate the value of the relevant G_n, in encoded
9912 constant-with-rotation format. */
9913 g_n
= calculate_group_reloc_mask (abs (signed_value
), group
,
9916 /* Check for overflow if required. */
9917 if ((r_type
== R_ARM_ALU_PC_G0
9918 || r_type
== R_ARM_ALU_PC_G1
9919 || r_type
== R_ARM_ALU_PC_G2
9920 || r_type
== R_ARM_ALU_SB_G0
9921 || r_type
== R_ARM_ALU_SB_G1
9922 || r_type
== R_ARM_ALU_SB_G2
) && residual
!= 0)
9924 (*_bfd_error_handler
)
9925 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9926 input_bfd
, input_section
,
9927 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
9928 return bfd_reloc_overflow
;
9931 /* Mask out the value and the ADD/SUB part of the opcode; take care
9932 not to destroy the S bit. */
9935 /* Set the opcode according to whether the value to go in the
9936 place is negative. */
9937 if (signed_value
< 0)
9942 /* Encode the offset. */
9945 bfd_put_32 (input_bfd
, insn
, hit_data
);
9947 return bfd_reloc_ok
;
9949 case R_ARM_LDR_PC_G0
:
9950 case R_ARM_LDR_PC_G1
:
9951 case R_ARM_LDR_PC_G2
:
9952 case R_ARM_LDR_SB_G0
:
9953 case R_ARM_LDR_SB_G1
:
9954 case R_ARM_LDR_SB_G2
:
9956 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9957 bfd_vma pc
= input_section
->output_section
->vma
9958 + input_section
->output_offset
+ rel
->r_offset
;
9959 bfd_vma sb
= 0; /* See note above. */
9961 bfd_signed_vma signed_value
;
9964 /* Determine which groups of bits to calculate. */
9967 case R_ARM_LDR_PC_G0
:
9968 case R_ARM_LDR_SB_G0
:
9972 case R_ARM_LDR_PC_G1
:
9973 case R_ARM_LDR_SB_G1
:
9977 case R_ARM_LDR_PC_G2
:
9978 case R_ARM_LDR_SB_G2
:
9986 /* If REL, extract the addend from the insn. If RELA, it will
9987 have already been fetched for us. */
9988 if (globals
->use_rel
)
9990 int negative
= (insn
& (1 << 23)) ? 1 : -1;
9991 signed_addend
= negative
* (insn
& 0xfff);
9994 /* Compute the value (X) to go in the place. */
9995 if (r_type
== R_ARM_LDR_PC_G0
9996 || r_type
== R_ARM_LDR_PC_G1
9997 || r_type
== R_ARM_LDR_PC_G2
)
9999 signed_value
= value
- pc
+ signed_addend
;
10001 /* Section base relative. */
10002 signed_value
= value
- sb
+ signed_addend
;
10004 /* Calculate the value of the relevant G_{n-1} to obtain
10005 the residual at that stage. */
10006 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
10008 /* Check for overflow. */
10009 if (residual
>= 0x1000)
10011 (*_bfd_error_handler
)
10012 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10013 input_bfd
, input_section
,
10014 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
10015 return bfd_reloc_overflow
;
10018 /* Mask out the value and U bit. */
10019 insn
&= 0xff7ff000;
10021 /* Set the U bit if the value to go in the place is non-negative. */
10022 if (signed_value
>= 0)
10025 /* Encode the offset. */
10028 bfd_put_32 (input_bfd
, insn
, hit_data
);
10030 return bfd_reloc_ok
;
10032 case R_ARM_LDRS_PC_G0
:
10033 case R_ARM_LDRS_PC_G1
:
10034 case R_ARM_LDRS_PC_G2
:
10035 case R_ARM_LDRS_SB_G0
:
10036 case R_ARM_LDRS_SB_G1
:
10037 case R_ARM_LDRS_SB_G2
:
10039 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
10040 bfd_vma pc
= input_section
->output_section
->vma
10041 + input_section
->output_offset
+ rel
->r_offset
;
10042 bfd_vma sb
= 0; /* See note above. */
10044 bfd_signed_vma signed_value
;
10047 /* Determine which groups of bits to calculate. */
10050 case R_ARM_LDRS_PC_G0
:
10051 case R_ARM_LDRS_SB_G0
:
10055 case R_ARM_LDRS_PC_G1
:
10056 case R_ARM_LDRS_SB_G1
:
10060 case R_ARM_LDRS_PC_G2
:
10061 case R_ARM_LDRS_SB_G2
:
10069 /* If REL, extract the addend from the insn. If RELA, it will
10070 have already been fetched for us. */
10071 if (globals
->use_rel
)
10073 int negative
= (insn
& (1 << 23)) ? 1 : -1;
10074 signed_addend
= negative
* (((insn
& 0xf00) >> 4) + (insn
& 0xf));
10077 /* Compute the value (X) to go in the place. */
10078 if (r_type
== R_ARM_LDRS_PC_G0
10079 || r_type
== R_ARM_LDRS_PC_G1
10080 || r_type
== R_ARM_LDRS_PC_G2
)
10082 signed_value
= value
- pc
+ signed_addend
;
10084 /* Section base relative. */
10085 signed_value
= value
- sb
+ signed_addend
;
10087 /* Calculate the value of the relevant G_{n-1} to obtain
10088 the residual at that stage. */
10089 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
10091 /* Check for overflow. */
10092 if (residual
>= 0x100)
10094 (*_bfd_error_handler
)
10095 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10096 input_bfd
, input_section
,
10097 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
10098 return bfd_reloc_overflow
;
10101 /* Mask out the value and U bit. */
10102 insn
&= 0xff7ff0f0;
10104 /* Set the U bit if the value to go in the place is non-negative. */
10105 if (signed_value
>= 0)
10108 /* Encode the offset. */
10109 insn
|= ((residual
& 0xf0) << 4) | (residual
& 0xf);
10111 bfd_put_32 (input_bfd
, insn
, hit_data
);
10113 return bfd_reloc_ok
;
10115 case R_ARM_LDC_PC_G0
:
10116 case R_ARM_LDC_PC_G1
:
10117 case R_ARM_LDC_PC_G2
:
10118 case R_ARM_LDC_SB_G0
:
10119 case R_ARM_LDC_SB_G1
:
10120 case R_ARM_LDC_SB_G2
:
10122 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
10123 bfd_vma pc
= input_section
->output_section
->vma
10124 + input_section
->output_offset
+ rel
->r_offset
;
10125 bfd_vma sb
= 0; /* See note above. */
10127 bfd_signed_vma signed_value
;
10130 /* Determine which groups of bits to calculate. */
10133 case R_ARM_LDC_PC_G0
:
10134 case R_ARM_LDC_SB_G0
:
10138 case R_ARM_LDC_PC_G1
:
10139 case R_ARM_LDC_SB_G1
:
10143 case R_ARM_LDC_PC_G2
:
10144 case R_ARM_LDC_SB_G2
:
10152 /* If REL, extract the addend from the insn. If RELA, it will
10153 have already been fetched for us. */
10154 if (globals
->use_rel
)
10156 int negative
= (insn
& (1 << 23)) ? 1 : -1;
10157 signed_addend
= negative
* ((insn
& 0xff) << 2);
10160 /* Compute the value (X) to go in the place. */
10161 if (r_type
== R_ARM_LDC_PC_G0
10162 || r_type
== R_ARM_LDC_PC_G1
10163 || r_type
== R_ARM_LDC_PC_G2
)
10165 signed_value
= value
- pc
+ signed_addend
;
10167 /* Section base relative. */
10168 signed_value
= value
- sb
+ signed_addend
;
10170 /* Calculate the value of the relevant G_{n-1} to obtain
10171 the residual at that stage. */
10172 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
10174 /* Check for overflow. (The absolute value to go in the place must be
10175 divisible by four and, after having been divided by four, must
10176 fit in eight bits.) */
10177 if ((residual
& 0x3) != 0 || residual
>= 0x400)
10179 (*_bfd_error_handler
)
10180 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10181 input_bfd
, input_section
,
10182 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
10183 return bfd_reloc_overflow
;
10186 /* Mask out the value and U bit. */
10187 insn
&= 0xff7fff00;
10189 /* Set the U bit if the value to go in the place is non-negative. */
10190 if (signed_value
>= 0)
10193 /* Encode the offset. */
10194 insn
|= residual
>> 2;
10196 bfd_put_32 (input_bfd
, insn
, hit_data
);
10198 return bfd_reloc_ok
;
10201 return bfd_reloc_notsupported
;
10205 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
10207 arm_add_to_rel (bfd
* abfd
,
10208 bfd_byte
* address
,
10209 reloc_howto_type
* howto
,
10210 bfd_signed_vma increment
)
10212 bfd_signed_vma addend
;
10214 if (howto
->type
== R_ARM_THM_CALL
10215 || howto
->type
== R_ARM_THM_JUMP24
)
10217 int upper_insn
, lower_insn
;
10220 upper_insn
= bfd_get_16 (abfd
, address
);
10221 lower_insn
= bfd_get_16 (abfd
, address
+ 2);
10222 upper
= upper_insn
& 0x7ff;
10223 lower
= lower_insn
& 0x7ff;
10225 addend
= (upper
<< 12) | (lower
<< 1);
10226 addend
+= increment
;
10229 upper_insn
= (upper_insn
& 0xf800) | ((addend
>> 11) & 0x7ff);
10230 lower_insn
= (lower_insn
& 0xf800) | (addend
& 0x7ff);
10232 bfd_put_16 (abfd
, (bfd_vma
) upper_insn
, address
);
10233 bfd_put_16 (abfd
, (bfd_vma
) lower_insn
, address
+ 2);
10239 contents
= bfd_get_32 (abfd
, address
);
10241 /* Get the (signed) value from the instruction. */
10242 addend
= contents
& howto
->src_mask
;
10243 if (addend
& ((howto
->src_mask
+ 1) >> 1))
10245 bfd_signed_vma mask
;
10248 mask
&= ~ howto
->src_mask
;
10252 /* Add in the increment, (which is a byte value). */
10253 switch (howto
->type
)
10256 addend
+= increment
;
10263 addend
<<= howto
->size
;
10264 addend
+= increment
;
10266 /* Should we check for overflow here ? */
10268 /* Drop any undesired bits. */
10269 addend
>>= howto
->rightshift
;
10273 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
10275 bfd_put_32 (abfd
, contents
, address
);
10279 #define IS_ARM_TLS_RELOC(R_TYPE) \
10280 ((R_TYPE) == R_ARM_TLS_GD32 \
10281 || (R_TYPE) == R_ARM_TLS_LDO32 \
10282 || (R_TYPE) == R_ARM_TLS_LDM32 \
10283 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
10284 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
10285 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
10286 || (R_TYPE) == R_ARM_TLS_LE32 \
10287 || (R_TYPE) == R_ARM_TLS_IE32 \
10288 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
10290 /* Specific set of relocations for the gnu tls dialect. */
10291 #define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
10292 ((R_TYPE) == R_ARM_TLS_GOTDESC \
10293 || (R_TYPE) == R_ARM_TLS_CALL \
10294 || (R_TYPE) == R_ARM_THM_TLS_CALL \
10295 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
10296 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
10298 /* Relocate an ARM ELF section. */
10301 elf32_arm_relocate_section (bfd
* output_bfd
,
10302 struct bfd_link_info
* info
,
10304 asection
* input_section
,
10305 bfd_byte
* contents
,
10306 Elf_Internal_Rela
* relocs
,
10307 Elf_Internal_Sym
* local_syms
,
10308 asection
** local_sections
)
10310 Elf_Internal_Shdr
*symtab_hdr
;
10311 struct elf_link_hash_entry
**sym_hashes
;
10312 Elf_Internal_Rela
*rel
;
10313 Elf_Internal_Rela
*relend
;
10315 struct elf32_arm_link_hash_table
* globals
;
10317 globals
= elf32_arm_hash_table (info
);
10318 if (globals
== NULL
)
10321 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
10322 sym_hashes
= elf_sym_hashes (input_bfd
);
10325 relend
= relocs
+ input_section
->reloc_count
;
10326 for (; rel
< relend
; rel
++)
10329 reloc_howto_type
* howto
;
10330 unsigned long r_symndx
;
10331 Elf_Internal_Sym
* sym
;
10333 struct elf_link_hash_entry
* h
;
10334 bfd_vma relocation
;
10335 bfd_reloc_status_type r
;
10338 bfd_boolean unresolved_reloc
= FALSE
;
10339 char *error_message
= NULL
;
10341 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10342 r_type
= ELF32_R_TYPE (rel
->r_info
);
10343 r_type
= arm_real_reloc_type (globals
, r_type
);
10345 if ( r_type
== R_ARM_GNU_VTENTRY
10346 || r_type
== R_ARM_GNU_VTINHERIT
)
10349 bfd_reloc
.howto
= elf32_arm_howto_from_type (r_type
);
10350 howto
= bfd_reloc
.howto
;
10356 if (r_symndx
< symtab_hdr
->sh_info
)
10358 sym
= local_syms
+ r_symndx
;
10359 sym_type
= ELF32_ST_TYPE (sym
->st_info
);
10360 sec
= local_sections
[r_symndx
];
10362 /* An object file might have a reference to a local
10363 undefined symbol. This is a daft object file, but we
10364 should at least do something about it. V4BX & NONE
10365 relocations do not use the symbol and are explicitly
10366 allowed to use the undefined symbol, so allow those.
10367 Likewise for relocations against STN_UNDEF. */
10368 if (r_type
!= R_ARM_V4BX
10369 && r_type
!= R_ARM_NONE
10370 && r_symndx
!= STN_UNDEF
10371 && bfd_is_und_section (sec
)
10372 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
10374 if (!info
->callbacks
->undefined_symbol
10375 (info
, bfd_elf_string_from_elf_section
10376 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
10377 input_bfd
, input_section
,
10378 rel
->r_offset
, TRUE
))
10382 if (globals
->use_rel
)
10384 relocation
= (sec
->output_section
->vma
10385 + sec
->output_offset
10387 if (!info
->relocatable
10388 && (sec
->flags
& SEC_MERGE
)
10389 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
10392 bfd_vma addend
, value
;
10396 case R_ARM_MOVW_ABS_NC
:
10397 case R_ARM_MOVT_ABS
:
10398 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
10399 addend
= ((value
& 0xf0000) >> 4) | (value
& 0xfff);
10400 addend
= (addend
^ 0x8000) - 0x8000;
10403 case R_ARM_THM_MOVW_ABS_NC
:
10404 case R_ARM_THM_MOVT_ABS
:
10405 value
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
)
10407 value
|= bfd_get_16 (input_bfd
,
10408 contents
+ rel
->r_offset
+ 2);
10409 addend
= ((value
& 0xf7000) >> 4) | (value
& 0xff)
10410 | ((value
& 0x04000000) >> 15);
10411 addend
= (addend
^ 0x8000) - 0x8000;
10415 if (howto
->rightshift
10416 || (howto
->src_mask
& (howto
->src_mask
+ 1)))
10418 (*_bfd_error_handler
)
10419 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
10420 input_bfd
, input_section
,
10421 (long) rel
->r_offset
, howto
->name
);
10425 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
10427 /* Get the (signed) value from the instruction. */
10428 addend
= value
& howto
->src_mask
;
10429 if (addend
& ((howto
->src_mask
+ 1) >> 1))
10431 bfd_signed_vma mask
;
10434 mask
&= ~ howto
->src_mask
;
10442 _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
)
10444 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
10446 /* Cases here must match those in the preceding
10447 switch statement. */
10450 case R_ARM_MOVW_ABS_NC
:
10451 case R_ARM_MOVT_ABS
:
10452 value
= (value
& 0xfff0f000) | ((addend
& 0xf000) << 4)
10453 | (addend
& 0xfff);
10454 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
10457 case R_ARM_THM_MOVW_ABS_NC
:
10458 case R_ARM_THM_MOVT_ABS
:
10459 value
= (value
& 0xfbf08f00) | ((addend
& 0xf700) << 4)
10460 | (addend
& 0xff) | ((addend
& 0x0800) << 15);
10461 bfd_put_16 (input_bfd
, value
>> 16,
10462 contents
+ rel
->r_offset
);
10463 bfd_put_16 (input_bfd
, value
,
10464 contents
+ rel
->r_offset
+ 2);
10468 value
= (value
& ~ howto
->dst_mask
)
10469 | (addend
& howto
->dst_mask
);
10470 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
10476 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
10480 bfd_boolean warned
;
10482 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
10483 r_symndx
, symtab_hdr
, sym_hashes
,
10484 h
, sec
, relocation
,
10485 unresolved_reloc
, warned
);
10487 sym_type
= h
->type
;
10490 if (sec
!= NULL
&& discarded_section (sec
))
10491 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
10492 rel
, 1, relend
, howto
, 0, contents
);
10494 if (info
->relocatable
)
10496 /* This is a relocatable link. We don't have to change
10497 anything, unless the reloc is against a section symbol,
10498 in which case we have to adjust according to where the
10499 section symbol winds up in the output section. */
10500 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
10502 if (globals
->use_rel
)
10503 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
10504 howto
, (bfd_signed_vma
) sec
->output_offset
);
10506 rel
->r_addend
+= sec
->output_offset
;
10512 name
= h
->root
.root
.string
;
10515 name
= (bfd_elf_string_from_elf_section
10516 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
10517 if (name
== NULL
|| *name
== '\0')
10518 name
= bfd_section_name (input_bfd
, sec
);
10521 if (r_symndx
!= STN_UNDEF
10522 && r_type
!= R_ARM_NONE
10524 || h
->root
.type
== bfd_link_hash_defined
10525 || h
->root
.type
== bfd_link_hash_defweak
)
10526 && IS_ARM_TLS_RELOC (r_type
) != (sym_type
== STT_TLS
))
10528 (*_bfd_error_handler
)
10529 ((sym_type
== STT_TLS
10530 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10531 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
10534 (long) rel
->r_offset
,
10539 /* We call elf32_arm_final_link_relocate unless we're completely
10540 done, i.e., the relaxation produced the final output we want,
10541 and we won't let anybody mess with it. Also, we have to do
10542 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
10543 both in relaxed and non-relaxed cases */
10544 if ((elf32_arm_tls_transition (info
, r_type
, h
) != (unsigned)r_type
)
10545 || (IS_ARM_TLS_GNU_RELOC (r_type
)
10546 && !((h
? elf32_arm_hash_entry (h
)->tls_type
:
10547 elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
])
10550 r
= elf32_arm_tls_relax (globals
, input_bfd
, input_section
,
10551 contents
, rel
, h
== NULL
);
10552 /* This may have been marked unresolved because it came from
10553 a shared library. But we've just dealt with that. */
10554 unresolved_reloc
= 0;
10557 r
= bfd_reloc_continue
;
10559 if (r
== bfd_reloc_continue
)
10560 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
10561 input_section
, contents
, rel
,
10562 relocation
, info
, sec
, name
, sym_type
,
10563 (h
? h
->target_internal
10564 : ARM_SYM_BRANCH_TYPE (sym
)), h
,
10565 &unresolved_reloc
, &error_message
);
10567 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10568 because such sections are not SEC_ALLOC and thus ld.so will
10569 not process them. */
10570 if (unresolved_reloc
10571 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
10573 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
10574 rel
->r_offset
) != (bfd_vma
) -1)
10576 (*_bfd_error_handler
)
10577 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10580 (long) rel
->r_offset
,
10582 h
->root
.root
.string
);
10586 if (r
!= bfd_reloc_ok
)
10590 case bfd_reloc_overflow
:
10591 /* If the overflowing reloc was to an undefined symbol,
10592 we have already printed one error message and there
10593 is no point complaining again. */
10595 h
->root
.type
!= bfd_link_hash_undefined
)
10596 && (!((*info
->callbacks
->reloc_overflow
)
10597 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
10598 (bfd_vma
) 0, input_bfd
, input_section
,
10603 case bfd_reloc_undefined
:
10604 if (!((*info
->callbacks
->undefined_symbol
)
10605 (info
, name
, input_bfd
, input_section
,
10606 rel
->r_offset
, TRUE
)))
10610 case bfd_reloc_outofrange
:
10611 error_message
= _("out of range");
10614 case bfd_reloc_notsupported
:
10615 error_message
= _("unsupported relocation");
10618 case bfd_reloc_dangerous
:
10619 /* error_message should already be set. */
10623 error_message
= _("unknown error");
10624 /* Fall through. */
10627 BFD_ASSERT (error_message
!= NULL
);
10628 if (!((*info
->callbacks
->reloc_dangerous
)
10629 (info
, error_message
, input_bfd
, input_section
,
10640 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
10641 adds the edit to the start of the list. (The list must be built in order of
10642 ascending TINDEX: the function's callers are primarily responsible for
10643 maintaining that condition). */
10646 add_unwind_table_edit (arm_unwind_table_edit
**head
,
10647 arm_unwind_table_edit
**tail
,
10648 arm_unwind_edit_type type
,
10649 asection
*linked_section
,
10650 unsigned int tindex
)
10652 arm_unwind_table_edit
*new_edit
= (arm_unwind_table_edit
*)
10653 xmalloc (sizeof (arm_unwind_table_edit
));
10655 new_edit
->type
= type
;
10656 new_edit
->linked_section
= linked_section
;
10657 new_edit
->index
= tindex
;
10661 new_edit
->next
= NULL
;
10664 (*tail
)->next
= new_edit
;
10666 (*tail
) = new_edit
;
10669 (*head
) = new_edit
;
10673 new_edit
->next
= *head
;
10682 static _arm_elf_section_data
*get_arm_elf_section_data (asection
*);
10684 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
10686 adjust_exidx_size(asection
*exidx_sec
, int adjust
)
10690 if (!exidx_sec
->rawsize
)
10691 exidx_sec
->rawsize
= exidx_sec
->size
;
10693 bfd_set_section_size (exidx_sec
->owner
, exidx_sec
, exidx_sec
->size
+ adjust
);
10694 out_sec
= exidx_sec
->output_section
;
10695 /* Adjust size of output section. */
10696 bfd_set_section_size (out_sec
->owner
, out_sec
, out_sec
->size
+adjust
);
10699 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
10701 insert_cantunwind_after(asection
*text_sec
, asection
*exidx_sec
)
10703 struct _arm_elf_section_data
*exidx_arm_data
;
10705 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
10706 add_unwind_table_edit (
10707 &exidx_arm_data
->u
.exidx
.unwind_edit_list
,
10708 &exidx_arm_data
->u
.exidx
.unwind_edit_tail
,
10709 INSERT_EXIDX_CANTUNWIND_AT_END
, text_sec
, UINT_MAX
);
10711 adjust_exidx_size(exidx_sec
, 8);
10714 /* Scan .ARM.exidx tables, and create a list describing edits which should be
10715 made to those tables, such that:
10717 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
10718 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
10719 codes which have been inlined into the index).
10721 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
10723 The edits are applied when the tables are written
10724 (in elf32_arm_write_section). */
10727 elf32_arm_fix_exidx_coverage (asection
**text_section_order
,
10728 unsigned int num_text_sections
,
10729 struct bfd_link_info
*info
,
10730 bfd_boolean merge_exidx_entries
)
10733 unsigned int last_second_word
= 0, i
;
10734 asection
*last_exidx_sec
= NULL
;
10735 asection
*last_text_sec
= NULL
;
10736 int last_unwind_type
= -1;
10738 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
10740 for (inp
= info
->input_bfds
; inp
!= NULL
; inp
= inp
->link_next
)
10744 for (sec
= inp
->sections
; sec
!= NULL
; sec
= sec
->next
)
10746 struct bfd_elf_section_data
*elf_sec
= elf_section_data (sec
);
10747 Elf_Internal_Shdr
*hdr
= &elf_sec
->this_hdr
;
10749 if (!hdr
|| hdr
->sh_type
!= SHT_ARM_EXIDX
)
10752 if (elf_sec
->linked_to
)
10754 Elf_Internal_Shdr
*linked_hdr
10755 = &elf_section_data (elf_sec
->linked_to
)->this_hdr
;
10756 struct _arm_elf_section_data
*linked_sec_arm_data
10757 = get_arm_elf_section_data (linked_hdr
->bfd_section
);
10759 if (linked_sec_arm_data
== NULL
)
10762 /* Link this .ARM.exidx section back from the text section it
10764 linked_sec_arm_data
->u
.text
.arm_exidx_sec
= sec
;
10769 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
10770 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
10771 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
10773 for (i
= 0; i
< num_text_sections
; i
++)
10775 asection
*sec
= text_section_order
[i
];
10776 asection
*exidx_sec
;
10777 struct _arm_elf_section_data
*arm_data
= get_arm_elf_section_data (sec
);
10778 struct _arm_elf_section_data
*exidx_arm_data
;
10779 bfd_byte
*contents
= NULL
;
10780 int deleted_exidx_bytes
= 0;
10782 arm_unwind_table_edit
*unwind_edit_head
= NULL
;
10783 arm_unwind_table_edit
*unwind_edit_tail
= NULL
;
10784 Elf_Internal_Shdr
*hdr
;
10787 if (arm_data
== NULL
)
10790 exidx_sec
= arm_data
->u
.text
.arm_exidx_sec
;
10791 if (exidx_sec
== NULL
)
10793 /* Section has no unwind data. */
10794 if (last_unwind_type
== 0 || !last_exidx_sec
)
10797 /* Ignore zero sized sections. */
10798 if (sec
->size
== 0)
10801 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
10802 last_unwind_type
= 0;
10806 /* Skip /DISCARD/ sections. */
10807 if (bfd_is_abs_section (exidx_sec
->output_section
))
10810 hdr
= &elf_section_data (exidx_sec
)->this_hdr
;
10811 if (hdr
->sh_type
!= SHT_ARM_EXIDX
)
10814 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
10815 if (exidx_arm_data
== NULL
)
10818 ibfd
= exidx_sec
->owner
;
10820 if (hdr
->contents
!= NULL
)
10821 contents
= hdr
->contents
;
10822 else if (! bfd_malloc_and_get_section (ibfd
, exidx_sec
, &contents
))
10826 for (j
= 0; j
< hdr
->sh_size
; j
+= 8)
10828 unsigned int second_word
= bfd_get_32 (ibfd
, contents
+ j
+ 4);
10832 /* An EXIDX_CANTUNWIND entry. */
10833 if (second_word
== 1)
10835 if (last_unwind_type
== 0)
10839 /* Inlined unwinding data. Merge if equal to previous. */
10840 else if ((second_word
& 0x80000000) != 0)
10842 if (merge_exidx_entries
10843 && last_second_word
== second_word
&& last_unwind_type
== 1)
10846 last_second_word
= second_word
;
10848 /* Normal table entry. In theory we could merge these too,
10849 but duplicate entries are likely to be much less common. */
10855 add_unwind_table_edit (&unwind_edit_head
, &unwind_edit_tail
,
10856 DELETE_EXIDX_ENTRY
, NULL
, j
/ 8);
10858 deleted_exidx_bytes
+= 8;
10861 last_unwind_type
= unwind_type
;
10864 /* Free contents if we allocated it ourselves. */
10865 if (contents
!= hdr
->contents
)
10868 /* Record edits to be applied later (in elf32_arm_write_section). */
10869 exidx_arm_data
->u
.exidx
.unwind_edit_list
= unwind_edit_head
;
10870 exidx_arm_data
->u
.exidx
.unwind_edit_tail
= unwind_edit_tail
;
10872 if (deleted_exidx_bytes
> 0)
10873 adjust_exidx_size(exidx_sec
, -deleted_exidx_bytes
);
10875 last_exidx_sec
= exidx_sec
;
10876 last_text_sec
= sec
;
10879 /* Add terminating CANTUNWIND entry. */
10880 if (last_exidx_sec
&& last_unwind_type
!= 0)
10881 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
10887 elf32_arm_output_glue_section (struct bfd_link_info
*info
, bfd
*obfd
,
10888 bfd
*ibfd
, const char *name
)
10890 asection
*sec
, *osec
;
10892 sec
= bfd_get_linker_section (ibfd
, name
);
10893 if (sec
== NULL
|| (sec
->flags
& SEC_EXCLUDE
) != 0)
10896 osec
= sec
->output_section
;
10897 if (elf32_arm_write_section (obfd
, info
, sec
, sec
->contents
))
10900 if (! bfd_set_section_contents (obfd
, osec
, sec
->contents
,
10901 sec
->output_offset
, sec
->size
))
10908 elf32_arm_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
10910 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
10911 asection
*sec
, *osec
;
10913 if (globals
== NULL
)
10916 /* Invoke the regular ELF backend linker to do all the work. */
10917 if (!bfd_elf_final_link (abfd
, info
))
10920 /* Process stub sections (eg BE8 encoding, ...). */
10921 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
10923 for (i
=0; i
<htab
->top_id
; i
++)
10925 sec
= htab
->stub_group
[i
].stub_sec
;
10926 /* Only process it once, in its link_sec slot. */
10927 if (sec
&& i
== htab
->stub_group
[i
].link_sec
->id
)
10929 osec
= sec
->output_section
;
10930 elf32_arm_write_section (abfd
, info
, sec
, sec
->contents
);
10931 if (! bfd_set_section_contents (abfd
, osec
, sec
->contents
,
10932 sec
->output_offset
, sec
->size
))
10937 /* Write out any glue sections now that we have created all the
10939 if (globals
->bfd_of_glue_owner
!= NULL
)
10941 if (! elf32_arm_output_glue_section (info
, abfd
,
10942 globals
->bfd_of_glue_owner
,
10943 ARM2THUMB_GLUE_SECTION_NAME
))
10946 if (! elf32_arm_output_glue_section (info
, abfd
,
10947 globals
->bfd_of_glue_owner
,
10948 THUMB2ARM_GLUE_SECTION_NAME
))
10951 if (! elf32_arm_output_glue_section (info
, abfd
,
10952 globals
->bfd_of_glue_owner
,
10953 VFP11_ERRATUM_VENEER_SECTION_NAME
))
10956 if (! elf32_arm_output_glue_section (info
, abfd
,
10957 globals
->bfd_of_glue_owner
,
10958 ARM_BX_GLUE_SECTION_NAME
))
10965 /* Return a best guess for the machine number based on the attributes. */
10967 static unsigned int
10968 bfd_arm_get_mach_from_attributes (bfd
* abfd
)
10970 int arch
= bfd_elf_get_obj_attr_int (abfd
, OBJ_ATTR_PROC
, Tag_CPU_arch
);
10974 case TAG_CPU_ARCH_V4
: return bfd_mach_arm_4
;
10975 case TAG_CPU_ARCH_V4T
: return bfd_mach_arm_4T
;
10976 case TAG_CPU_ARCH_V5T
: return bfd_mach_arm_5T
;
10978 case TAG_CPU_ARCH_V5TE
:
10982 BFD_ASSERT (Tag_CPU_name
< NUM_KNOWN_OBJ_ATTRIBUTES
);
10983 name
= elf_known_obj_attributes (abfd
) [OBJ_ATTR_PROC
][Tag_CPU_name
].s
;
10987 if (strcmp (name
, "IWMMXT2") == 0)
10988 return bfd_mach_arm_iWMMXt2
;
10990 if (strcmp (name
, "IWMMXT") == 0)
10991 return bfd_mach_arm_iWMMXt
;
10994 return bfd_mach_arm_5TE
;
10998 return bfd_mach_arm_unknown
;
11002 /* Set the right machine number. */
11005 elf32_arm_object_p (bfd
*abfd
)
11009 mach
= bfd_arm_get_mach_from_notes (abfd
, ARM_NOTE_SECTION
);
11011 if (mach
== bfd_mach_arm_unknown
)
11013 if (elf_elfheader (abfd
)->e_flags
& EF_ARM_MAVERICK_FLOAT
)
11014 mach
= bfd_mach_arm_ep9312
;
11016 mach
= bfd_arm_get_mach_from_attributes (abfd
);
11019 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
11023 /* Function to keep ARM specific flags in the ELF header. */
11026 elf32_arm_set_private_flags (bfd
*abfd
, flagword flags
)
11028 if (elf_flags_init (abfd
)
11029 && elf_elfheader (abfd
)->e_flags
!= flags
)
11031 if (EF_ARM_EABI_VERSION (flags
) == EF_ARM_EABI_UNKNOWN
)
11033 if (flags
& EF_ARM_INTERWORK
)
11034 (*_bfd_error_handler
)
11035 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
11039 (_("Warning: Clearing the interworking flag of %B due to outside request"),
11045 elf_elfheader (abfd
)->e_flags
= flags
;
11046 elf_flags_init (abfd
) = TRUE
;
11052 /* Copy backend specific data from one object module to another. */
11055 elf32_arm_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
11058 flagword out_flags
;
11060 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
11063 in_flags
= elf_elfheader (ibfd
)->e_flags
;
11064 out_flags
= elf_elfheader (obfd
)->e_flags
;
11066 if (elf_flags_init (obfd
)
11067 && EF_ARM_EABI_VERSION (out_flags
) == EF_ARM_EABI_UNKNOWN
11068 && in_flags
!= out_flags
)
11070 /* Cannot mix APCS26 and APCS32 code. */
11071 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
11074 /* Cannot mix float APCS and non-float APCS code. */
11075 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
11078 /* If the src and dest have different interworking flags
11079 then turn off the interworking bit. */
11080 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
11082 if (out_flags
& EF_ARM_INTERWORK
)
11084 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
11087 in_flags
&= ~EF_ARM_INTERWORK
;
11090 /* Likewise for PIC, though don't warn for this case. */
11091 if ((in_flags
& EF_ARM_PIC
) != (out_flags
& EF_ARM_PIC
))
11092 in_flags
&= ~EF_ARM_PIC
;
11095 elf_elfheader (obfd
)->e_flags
= in_flags
;
11096 elf_flags_init (obfd
) = TRUE
;
11098 /* Also copy the EI_OSABI field. */
11099 elf_elfheader (obfd
)->e_ident
[EI_OSABI
] =
11100 elf_elfheader (ibfd
)->e_ident
[EI_OSABI
];
11102 /* Copy object attributes. */
11103 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
11108 /* Values for Tag_ABI_PCS_R9_use. */
11117 /* Values for Tag_ABI_PCS_RW_data. */
11120 AEABI_PCS_RW_data_absolute
,
11121 AEABI_PCS_RW_data_PCrel
,
11122 AEABI_PCS_RW_data_SBrel
,
11123 AEABI_PCS_RW_data_unused
11126 /* Values for Tag_ABI_enum_size. */
11132 AEABI_enum_forced_wide
11135 /* Determine whether an object attribute tag takes an integer, a
11139 elf32_arm_obj_attrs_arg_type (int tag
)
11141 if (tag
== Tag_compatibility
)
11142 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_STR_VAL
;
11143 else if (tag
== Tag_nodefaults
)
11144 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_NO_DEFAULT
;
11145 else if (tag
== Tag_CPU_raw_name
|| tag
== Tag_CPU_name
)
11146 return ATTR_TYPE_FLAG_STR_VAL
;
11148 return ATTR_TYPE_FLAG_INT_VAL
;
11150 return (tag
& 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL
: ATTR_TYPE_FLAG_INT_VAL
;
11153 /* The ABI defines that Tag_conformance should be emitted first, and that
11154 Tag_nodefaults should be second (if either is defined). This sets those
11155 two positions, and bumps up the position of all the remaining tags to
11158 elf32_arm_obj_attrs_order (int num
)
11160 if (num
== LEAST_KNOWN_OBJ_ATTRIBUTE
)
11161 return Tag_conformance
;
11162 if (num
== LEAST_KNOWN_OBJ_ATTRIBUTE
+ 1)
11163 return Tag_nodefaults
;
11164 if ((num
- 2) < Tag_nodefaults
)
11166 if ((num
- 1) < Tag_conformance
)
11171 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
11173 elf32_arm_obj_attrs_handle_unknown (bfd
*abfd
, int tag
)
11175 if ((tag
& 127) < 64)
11178 (_("%B: Unknown mandatory EABI object attribute %d"),
11180 bfd_set_error (bfd_error_bad_value
);
11186 (_("Warning: %B: Unknown EABI object attribute %d"),
11192 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
11193 Returns -1 if no architecture could be read. */
11196 get_secondary_compatible_arch (bfd
*abfd
)
11198 obj_attribute
*attr
=
11199 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
11201 /* Note: the tag and its argument below are uleb128 values, though
11202 currently-defined values fit in one byte for each. */
11204 && attr
->s
[0] == Tag_CPU_arch
11205 && (attr
->s
[1] & 128) != 128
11206 && attr
->s
[2] == 0)
11209 /* This tag is "safely ignorable", so don't complain if it looks funny. */
11213 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
11214 The tag is removed if ARCH is -1. */
11217 set_secondary_compatible_arch (bfd
*abfd
, int arch
)
11219 obj_attribute
*attr
=
11220 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
11228 /* Note: the tag and its argument below are uleb128 values, though
11229 currently-defined values fit in one byte for each. */
11231 attr
->s
= (char *) bfd_alloc (abfd
, 3);
11232 attr
->s
[0] = Tag_CPU_arch
;
11237 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
11241 tag_cpu_arch_combine (bfd
*ibfd
, int oldtag
, int *secondary_compat_out
,
11242 int newtag
, int secondary_compat
)
11244 #define T(X) TAG_CPU_ARCH_##X
11245 int tagl
, tagh
, result
;
11248 T(V6T2
), /* PRE_V4. */
11250 T(V6T2
), /* V4T. */
11251 T(V6T2
), /* V5T. */
11252 T(V6T2
), /* V5TE. */
11253 T(V6T2
), /* V5TEJ. */
11256 T(V6T2
) /* V6T2. */
11260 T(V6K
), /* PRE_V4. */
11264 T(V6K
), /* V5TE. */
11265 T(V6K
), /* V5TEJ. */
11267 T(V6KZ
), /* V6KZ. */
11273 T(V7
), /* PRE_V4. */
11278 T(V7
), /* V5TEJ. */
11291 T(V6K
), /* V5TE. */
11292 T(V6K
), /* V5TEJ. */
11294 T(V6KZ
), /* V6KZ. */
11298 T(V6_M
) /* V6_M. */
11300 const int v6s_m
[] =
11306 T(V6K
), /* V5TE. */
11307 T(V6K
), /* V5TEJ. */
11309 T(V6KZ
), /* V6KZ. */
11313 T(V6S_M
), /* V6_M. */
11314 T(V6S_M
) /* V6S_M. */
11316 const int v7e_m
[] =
11320 T(V7E_M
), /* V4T. */
11321 T(V7E_M
), /* V5T. */
11322 T(V7E_M
), /* V5TE. */
11323 T(V7E_M
), /* V5TEJ. */
11324 T(V7E_M
), /* V6. */
11325 T(V7E_M
), /* V6KZ. */
11326 T(V7E_M
), /* V6T2. */
11327 T(V7E_M
), /* V6K. */
11328 T(V7E_M
), /* V7. */
11329 T(V7E_M
), /* V6_M. */
11330 T(V7E_M
), /* V6S_M. */
11331 T(V7E_M
) /* V7E_M. */
11335 T(V8
), /* PRE_V4. */
11340 T(V8
), /* V5TEJ. */
11347 T(V8
), /* V6S_M. */
11348 T(V8
), /* V7E_M. */
11351 const int v4t_plus_v6_m
[] =
11357 T(V5TE
), /* V5TE. */
11358 T(V5TEJ
), /* V5TEJ. */
11360 T(V6KZ
), /* V6KZ. */
11361 T(V6T2
), /* V6T2. */
11364 T(V6_M
), /* V6_M. */
11365 T(V6S_M
), /* V6S_M. */
11366 T(V7E_M
), /* V7E_M. */
11368 T(V4T_PLUS_V6_M
) /* V4T plus V6_M. */
11370 const int *comb
[] =
11379 /* Pseudo-architecture. */
11383 /* Check we've not got a higher architecture than we know about. */
11385 if (oldtag
> MAX_TAG_CPU_ARCH
|| newtag
> MAX_TAG_CPU_ARCH
)
11387 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd
);
11391 /* Override old tag if we have a Tag_also_compatible_with on the output. */
11393 if ((oldtag
== T(V6_M
) && *secondary_compat_out
== T(V4T
))
11394 || (oldtag
== T(V4T
) && *secondary_compat_out
== T(V6_M
)))
11395 oldtag
= T(V4T_PLUS_V6_M
);
11397 /* And override the new tag if we have a Tag_also_compatible_with on the
11400 if ((newtag
== T(V6_M
) && secondary_compat
== T(V4T
))
11401 || (newtag
== T(V4T
) && secondary_compat
== T(V6_M
)))
11402 newtag
= T(V4T_PLUS_V6_M
);
11404 tagl
= (oldtag
< newtag
) ? oldtag
: newtag
;
11405 result
= tagh
= (oldtag
> newtag
) ? oldtag
: newtag
;
11407 /* Architectures before V6KZ add features monotonically. */
11408 if (tagh
<= TAG_CPU_ARCH_V6KZ
)
11411 result
= comb
[tagh
- T(V6T2
)][tagl
];
11413 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
11414 as the canonical version. */
11415 if (result
== T(V4T_PLUS_V6_M
))
11418 *secondary_compat_out
= T(V6_M
);
11421 *secondary_compat_out
= -1;
11425 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
11426 ibfd
, oldtag
, newtag
);
11434 /* Query attributes object to see if integer divide instructions may be
11435 present in an object. */
11437 elf32_arm_attributes_accept_div (const obj_attribute
*attr
)
11439 int arch
= attr
[Tag_CPU_arch
].i
;
11440 int profile
= attr
[Tag_CPU_arch_profile
].i
;
11442 switch (attr
[Tag_DIV_use
].i
)
11445 /* Integer divide allowed if instruction contained in archetecture. */
11446 if (arch
== TAG_CPU_ARCH_V7
&& (profile
== 'R' || profile
== 'M'))
11448 else if (arch
>= TAG_CPU_ARCH_V7E_M
)
11454 /* Integer divide explicitly prohibited. */
11458 /* Unrecognised case - treat as allowing divide everywhere. */
11460 /* Integer divide allowed in ARM state. */
11465 /* Query attributes object to see if integer divide instructions are
11466 forbidden to be in the object. This is not the inverse of
11467 elf32_arm_attributes_accept_div. */
11469 elf32_arm_attributes_forbid_div (const obj_attribute
*attr
)
11471 return attr
[Tag_DIV_use
].i
== 1;
11474 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
11475 are conflicting attributes. */
11478 elf32_arm_merge_eabi_attributes (bfd
*ibfd
, bfd
*obfd
)
11480 obj_attribute
*in_attr
;
11481 obj_attribute
*out_attr
;
11482 /* Some tags have 0 = don't care, 1 = strong requirement,
11483 2 = weak requirement. */
11484 static const int order_021
[3] = {0, 2, 1};
11486 bfd_boolean result
= TRUE
;
11488 /* Skip the linker stubs file. This preserves previous behavior
11489 of accepting unknown attributes in the first input file - but
11491 if (ibfd
->flags
& BFD_LINKER_CREATED
)
11494 if (!elf_known_obj_attributes_proc (obfd
)[0].i
)
11496 /* This is the first object. Copy the attributes. */
11497 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
11499 out_attr
= elf_known_obj_attributes_proc (obfd
);
11501 /* Use the Tag_null value to indicate the attributes have been
11505 /* We do not output objects with Tag_MPextension_use_legacy - we move
11506 the attribute's value to Tag_MPextension_use. */
11507 if (out_attr
[Tag_MPextension_use_legacy
].i
!= 0)
11509 if (out_attr
[Tag_MPextension_use
].i
!= 0
11510 && out_attr
[Tag_MPextension_use_legacy
].i
11511 != out_attr
[Tag_MPextension_use
].i
)
11514 (_("Error: %B has both the current and legacy "
11515 "Tag_MPextension_use attributes"), ibfd
);
11519 out_attr
[Tag_MPextension_use
] =
11520 out_attr
[Tag_MPextension_use_legacy
];
11521 out_attr
[Tag_MPextension_use_legacy
].type
= 0;
11522 out_attr
[Tag_MPextension_use_legacy
].i
= 0;
11528 in_attr
= elf_known_obj_attributes_proc (ibfd
);
11529 out_attr
= elf_known_obj_attributes_proc (obfd
);
11530 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
11531 if (in_attr
[Tag_ABI_VFP_args
].i
!= out_attr
[Tag_ABI_VFP_args
].i
)
11533 /* Ignore mismatches if the object doesn't use floating point. */
11534 if (out_attr
[Tag_ABI_FP_number_model
].i
== 0)
11535 out_attr
[Tag_ABI_VFP_args
].i
= in_attr
[Tag_ABI_VFP_args
].i
;
11536 else if (in_attr
[Tag_ABI_FP_number_model
].i
!= 0)
11539 (_("error: %B uses VFP register arguments, %B does not"),
11540 in_attr
[Tag_ABI_VFP_args
].i
? ibfd
: obfd
,
11541 in_attr
[Tag_ABI_VFP_args
].i
? obfd
: ibfd
);
11546 for (i
= LEAST_KNOWN_OBJ_ATTRIBUTE
; i
< NUM_KNOWN_OBJ_ATTRIBUTES
; i
++)
11548 /* Merge this attribute with existing attributes. */
11551 case Tag_CPU_raw_name
:
11553 /* These are merged after Tag_CPU_arch. */
11556 case Tag_ABI_optimization_goals
:
11557 case Tag_ABI_FP_optimization_goals
:
11558 /* Use the first value seen. */
11563 int secondary_compat
= -1, secondary_compat_out
= -1;
11564 unsigned int saved_out_attr
= out_attr
[i
].i
;
11565 static const char *name_table
[] = {
11566 /* These aren't real CPU names, but we can't guess
11567 that from the architecture version alone. */
11584 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
11585 secondary_compat
= get_secondary_compatible_arch (ibfd
);
11586 secondary_compat_out
= get_secondary_compatible_arch (obfd
);
11587 out_attr
[i
].i
= tag_cpu_arch_combine (ibfd
, out_attr
[i
].i
,
11588 &secondary_compat_out
,
11591 set_secondary_compatible_arch (obfd
, secondary_compat_out
);
11593 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
11594 if (out_attr
[i
].i
== saved_out_attr
)
11595 ; /* Leave the names alone. */
11596 else if (out_attr
[i
].i
== in_attr
[i
].i
)
11598 /* The output architecture has been changed to match the
11599 input architecture. Use the input names. */
11600 out_attr
[Tag_CPU_name
].s
= in_attr
[Tag_CPU_name
].s
11601 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_name
].s
)
11603 out_attr
[Tag_CPU_raw_name
].s
= in_attr
[Tag_CPU_raw_name
].s
11604 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_raw_name
].s
)
11609 out_attr
[Tag_CPU_name
].s
= NULL
;
11610 out_attr
[Tag_CPU_raw_name
].s
= NULL
;
11613 /* If we still don't have a value for Tag_CPU_name,
11614 make one up now. Tag_CPU_raw_name remains blank. */
11615 if (out_attr
[Tag_CPU_name
].s
== NULL
11616 && out_attr
[i
].i
< ARRAY_SIZE (name_table
))
11617 out_attr
[Tag_CPU_name
].s
=
11618 _bfd_elf_attr_strdup (obfd
, name_table
[out_attr
[i
].i
]);
11622 case Tag_ARM_ISA_use
:
11623 case Tag_THUMB_ISA_use
:
11624 case Tag_WMMX_arch
:
11625 case Tag_Advanced_SIMD_arch
:
11626 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
11627 case Tag_ABI_FP_rounding
:
11628 case Tag_ABI_FP_exceptions
:
11629 case Tag_ABI_FP_user_exceptions
:
11630 case Tag_ABI_FP_number_model
:
11631 case Tag_FP_HP_extension
:
11632 case Tag_CPU_unaligned_access
:
11634 case Tag_MPextension_use
:
11635 /* Use the largest value specified. */
11636 if (in_attr
[i
].i
> out_attr
[i
].i
)
11637 out_attr
[i
].i
= in_attr
[i
].i
;
11640 case Tag_ABI_align_preserved
:
11641 case Tag_ABI_PCS_RO_data
:
11642 /* Use the smallest value specified. */
11643 if (in_attr
[i
].i
< out_attr
[i
].i
)
11644 out_attr
[i
].i
= in_attr
[i
].i
;
11647 case Tag_ABI_align_needed
:
11648 if ((in_attr
[i
].i
> 0 || out_attr
[i
].i
> 0)
11649 && (in_attr
[Tag_ABI_align_preserved
].i
== 0
11650 || out_attr
[Tag_ABI_align_preserved
].i
== 0))
11652 /* This error message should be enabled once all non-conformant
11653 binaries in the toolchain have had the attributes set
11656 (_("error: %B: 8-byte data alignment conflicts with %B"),
11660 /* Fall through. */
11661 case Tag_ABI_FP_denormal
:
11662 case Tag_ABI_PCS_GOT_use
:
11663 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
11664 value if greater than 2 (for future-proofing). */
11665 if ((in_attr
[i
].i
> 2 && in_attr
[i
].i
> out_attr
[i
].i
)
11666 || (in_attr
[i
].i
<= 2 && out_attr
[i
].i
<= 2
11667 && order_021
[in_attr
[i
].i
] > order_021
[out_attr
[i
].i
]))
11668 out_attr
[i
].i
= in_attr
[i
].i
;
11671 case Tag_Virtualization_use
:
11672 /* The virtualization tag effectively stores two bits of
11673 information: the intended use of TrustZone (in bit 0), and the
11674 intended use of Virtualization (in bit 1). */
11675 if (out_attr
[i
].i
== 0)
11676 out_attr
[i
].i
= in_attr
[i
].i
;
11677 else if (in_attr
[i
].i
!= 0
11678 && in_attr
[i
].i
!= out_attr
[i
].i
)
11680 if (in_attr
[i
].i
<= 3 && out_attr
[i
].i
<= 3)
11685 (_("error: %B: unable to merge virtualization attributes "
11693 case Tag_CPU_arch_profile
:
11694 if (out_attr
[i
].i
!= in_attr
[i
].i
)
11696 /* 0 will merge with anything.
11697 'A' and 'S' merge to 'A'.
11698 'R' and 'S' merge to 'R'.
11699 'M' and 'A|R|S' is an error. */
11700 if (out_attr
[i
].i
== 0
11701 || (out_attr
[i
].i
== 'S'
11702 && (in_attr
[i
].i
== 'A' || in_attr
[i
].i
== 'R')))
11703 out_attr
[i
].i
= in_attr
[i
].i
;
11704 else if (in_attr
[i
].i
== 0
11705 || (in_attr
[i
].i
== 'S'
11706 && (out_attr
[i
].i
== 'A' || out_attr
[i
].i
== 'R')))
11707 ; /* Do nothing. */
11711 (_("error: %B: Conflicting architecture profiles %c/%c"),
11713 in_attr
[i
].i
? in_attr
[i
].i
: '0',
11714 out_attr
[i
].i
? out_attr
[i
].i
: '0');
11721 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
11722 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
11723 when it's 0. It might mean absence of FP hardware if
11724 Tag_FP_arch is zero, otherwise it is effectively SP + DP. */
11726 #define VFP_VERSION_COUNT 8
11727 static const struct
11731 } vfp_versions
[VFP_VERSION_COUNT
] =
11746 /* If the output has no requirement about FP hardware,
11747 follow the requirement of the input. */
11748 if (out_attr
[i
].i
== 0)
11750 BFD_ASSERT (out_attr
[Tag_ABI_HardFP_use
].i
== 0);
11751 out_attr
[i
].i
= in_attr
[i
].i
;
11752 out_attr
[Tag_ABI_HardFP_use
].i
11753 = in_attr
[Tag_ABI_HardFP_use
].i
;
11756 /* If the input has no requirement about FP hardware, do
11758 else if (in_attr
[i
].i
== 0)
11760 BFD_ASSERT (in_attr
[Tag_ABI_HardFP_use
].i
== 0);
11764 /* Both the input and the output have nonzero Tag_FP_arch.
11765 So Tag_ABI_HardFP_use is (SP & DP) when it's zero. */
11767 /* If both the input and the output have zero Tag_ABI_HardFP_use,
11769 if (in_attr
[Tag_ABI_HardFP_use
].i
== 0
11770 && out_attr
[Tag_ABI_HardFP_use
].i
== 0)
11772 /* If the input and the output have different Tag_ABI_HardFP_use,
11773 the combination of them is 3 (SP & DP). */
11774 else if (in_attr
[Tag_ABI_HardFP_use
].i
11775 != out_attr
[Tag_ABI_HardFP_use
].i
)
11776 out_attr
[Tag_ABI_HardFP_use
].i
= 3;
11778 /* Now we can handle Tag_FP_arch. */
11780 /* Values of VFP_VERSION_COUNT or more aren't defined, so just
11781 pick the biggest. */
11782 if (in_attr
[i
].i
>= VFP_VERSION_COUNT
11783 && in_attr
[i
].i
> out_attr
[i
].i
)
11785 out_attr
[i
] = in_attr
[i
];
11788 /* The output uses the superset of input features
11789 (ISA version) and registers. */
11790 ver
= vfp_versions
[in_attr
[i
].i
].ver
;
11791 if (ver
< vfp_versions
[out_attr
[i
].i
].ver
)
11792 ver
= vfp_versions
[out_attr
[i
].i
].ver
;
11793 regs
= vfp_versions
[in_attr
[i
].i
].regs
;
11794 if (regs
< vfp_versions
[out_attr
[i
].i
].regs
)
11795 regs
= vfp_versions
[out_attr
[i
].i
].regs
;
11796 /* This assumes all possible supersets are also a valid
11798 for (newval
= VFP_VERSION_COUNT
- 1; newval
> 0; newval
--)
11800 if (regs
== vfp_versions
[newval
].regs
11801 && ver
== vfp_versions
[newval
].ver
)
11804 out_attr
[i
].i
= newval
;
11807 case Tag_PCS_config
:
11808 if (out_attr
[i
].i
== 0)
11809 out_attr
[i
].i
= in_attr
[i
].i
;
11810 else if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= in_attr
[i
].i
)
11812 /* It's sometimes ok to mix different configs, so this is only
11815 (_("Warning: %B: Conflicting platform configuration"), ibfd
);
11818 case Tag_ABI_PCS_R9_use
:
11819 if (in_attr
[i
].i
!= out_attr
[i
].i
11820 && out_attr
[i
].i
!= AEABI_R9_unused
11821 && in_attr
[i
].i
!= AEABI_R9_unused
)
11824 (_("error: %B: Conflicting use of R9"), ibfd
);
11827 if (out_attr
[i
].i
== AEABI_R9_unused
)
11828 out_attr
[i
].i
= in_attr
[i
].i
;
11830 case Tag_ABI_PCS_RW_data
:
11831 if (in_attr
[i
].i
== AEABI_PCS_RW_data_SBrel
11832 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_SB
11833 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_unused
)
11836 (_("error: %B: SB relative addressing conflicts with use of R9"),
11840 /* Use the smallest value specified. */
11841 if (in_attr
[i
].i
< out_attr
[i
].i
)
11842 out_attr
[i
].i
= in_attr
[i
].i
;
11844 case Tag_ABI_PCS_wchar_t
:
11845 if (out_attr
[i
].i
&& in_attr
[i
].i
&& out_attr
[i
].i
!= in_attr
[i
].i
11846 && !elf_arm_tdata (obfd
)->no_wchar_size_warning
)
11849 (_("warning: %B uses %u-byte wchar_t yet the output is to use %u-byte wchar_t; use of wchar_t values across objects may fail"),
11850 ibfd
, in_attr
[i
].i
, out_attr
[i
].i
);
11852 else if (in_attr
[i
].i
&& !out_attr
[i
].i
)
11853 out_attr
[i
].i
= in_attr
[i
].i
;
11855 case Tag_ABI_enum_size
:
11856 if (in_attr
[i
].i
!= AEABI_enum_unused
)
11858 if (out_attr
[i
].i
== AEABI_enum_unused
11859 || out_attr
[i
].i
== AEABI_enum_forced_wide
)
11861 /* The existing object is compatible with anything.
11862 Use whatever requirements the new object has. */
11863 out_attr
[i
].i
= in_attr
[i
].i
;
11865 else if (in_attr
[i
].i
!= AEABI_enum_forced_wide
11866 && out_attr
[i
].i
!= in_attr
[i
].i
11867 && !elf_arm_tdata (obfd
)->no_enum_size_warning
)
11869 static const char *aeabi_enum_names
[] =
11870 { "", "variable-size", "32-bit", "" };
11871 const char *in_name
=
11872 in_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
11873 ? aeabi_enum_names
[in_attr
[i
].i
]
11875 const char *out_name
=
11876 out_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
11877 ? aeabi_enum_names
[out_attr
[i
].i
]
11880 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
11881 ibfd
, in_name
, out_name
);
11885 case Tag_ABI_VFP_args
:
11888 case Tag_ABI_WMMX_args
:
11889 if (in_attr
[i
].i
!= out_attr
[i
].i
)
11892 (_("error: %B uses iWMMXt register arguments, %B does not"),
11897 case Tag_compatibility
:
11898 /* Merged in target-independent code. */
11900 case Tag_ABI_HardFP_use
:
11901 /* This is handled along with Tag_FP_arch. */
11903 case Tag_ABI_FP_16bit_format
:
11904 if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
11906 if (in_attr
[i
].i
!= out_attr
[i
].i
)
11909 (_("error: fp16 format mismatch between %B and %B"),
11914 if (in_attr
[i
].i
!= 0)
11915 out_attr
[i
].i
= in_attr
[i
].i
;
11919 /* A value of zero on input means that the divide instruction may
11920 be used if available in the base architecture as specified via
11921 Tag_CPU_arch and Tag_CPU_arch_profile. A value of 1 means that
11922 the user did not want divide instructions. A value of 2
11923 explicitly means that divide instructions were allowed in ARM
11924 and Thumb state. */
11925 if (in_attr
[i
].i
== out_attr
[i
].i
)
11926 /* Do nothing. */ ;
11927 else if (elf32_arm_attributes_forbid_div (in_attr
)
11928 && !elf32_arm_attributes_accept_div (out_attr
))
11930 else if (elf32_arm_attributes_forbid_div (out_attr
)
11931 && elf32_arm_attributes_accept_div (in_attr
))
11932 out_attr
[i
].i
= in_attr
[i
].i
;
11933 else if (in_attr
[i
].i
== 2)
11934 out_attr
[i
].i
= in_attr
[i
].i
;
11937 case Tag_MPextension_use_legacy
:
11938 /* We don't output objects with Tag_MPextension_use_legacy - we
11939 move the value to Tag_MPextension_use. */
11940 if (in_attr
[i
].i
!= 0 && in_attr
[Tag_MPextension_use
].i
!= 0)
11942 if (in_attr
[Tag_MPextension_use
].i
!= in_attr
[i
].i
)
11945 (_("%B has has both the current and legacy "
11946 "Tag_MPextension_use attributes"),
11952 if (in_attr
[i
].i
> out_attr
[Tag_MPextension_use
].i
)
11953 out_attr
[Tag_MPextension_use
] = in_attr
[i
];
11957 case Tag_nodefaults
:
11958 /* This tag is set if it exists, but the value is unused (and is
11959 typically zero). We don't actually need to do anything here -
11960 the merge happens automatically when the type flags are merged
11963 case Tag_also_compatible_with
:
11964 /* Already done in Tag_CPU_arch. */
11966 case Tag_conformance
:
11967 /* Keep the attribute if it matches. Throw it away otherwise.
11968 No attribute means no claim to conform. */
11969 if (!in_attr
[i
].s
|| !out_attr
[i
].s
11970 || strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0)
11971 out_attr
[i
].s
= NULL
;
11976 = result
&& _bfd_elf_merge_unknown_attribute_low (ibfd
, obfd
, i
);
11979 /* If out_attr was copied from in_attr then it won't have a type yet. */
11980 if (in_attr
[i
].type
&& !out_attr
[i
].type
)
11981 out_attr
[i
].type
= in_attr
[i
].type
;
11984 /* Merge Tag_compatibility attributes and any common GNU ones. */
11985 if (!_bfd_elf_merge_object_attributes (ibfd
, obfd
))
11988 /* Check for any attributes not known on ARM. */
11989 result
&= _bfd_elf_merge_unknown_attribute_list (ibfd
, obfd
);
11995 /* Return TRUE if the two EABI versions are incompatible. */
11998 elf32_arm_versions_compatible (unsigned iver
, unsigned over
)
12000 /* v4 and v5 are the same spec before and after it was released,
12001 so allow mixing them. */
12002 if ((iver
== EF_ARM_EABI_VER4
&& over
== EF_ARM_EABI_VER5
)
12003 || (iver
== EF_ARM_EABI_VER5
&& over
== EF_ARM_EABI_VER4
))
12006 return (iver
== over
);
12009 /* Merge backend specific data from an object file to the output
12010 object file when linking. */
12013 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
);
12015 /* Display the flags field. */
12018 elf32_arm_print_private_bfd_data (bfd
*abfd
, void * ptr
)
12020 FILE * file
= (FILE *) ptr
;
12021 unsigned long flags
;
12023 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
12025 /* Print normal ELF private data. */
12026 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
12028 flags
= elf_elfheader (abfd
)->e_flags
;
12029 /* Ignore init flag - it may not be set, despite the flags field
12030 containing valid data. */
12032 /* xgettext:c-format */
12033 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
12035 switch (EF_ARM_EABI_VERSION (flags
))
12037 case EF_ARM_EABI_UNKNOWN
:
12038 /* The following flag bits are GNU extensions and not part of the
12039 official ARM ELF extended ABI. Hence they are only decoded if
12040 the EABI version is not set. */
12041 if (flags
& EF_ARM_INTERWORK
)
12042 fprintf (file
, _(" [interworking enabled]"));
12044 if (flags
& EF_ARM_APCS_26
)
12045 fprintf (file
, " [APCS-26]");
12047 fprintf (file
, " [APCS-32]");
12049 if (flags
& EF_ARM_VFP_FLOAT
)
12050 fprintf (file
, _(" [VFP float format]"));
12051 else if (flags
& EF_ARM_MAVERICK_FLOAT
)
12052 fprintf (file
, _(" [Maverick float format]"));
12054 fprintf (file
, _(" [FPA float format]"));
12056 if (flags
& EF_ARM_APCS_FLOAT
)
12057 fprintf (file
, _(" [floats passed in float registers]"));
12059 if (flags
& EF_ARM_PIC
)
12060 fprintf (file
, _(" [position independent]"));
12062 if (flags
& EF_ARM_NEW_ABI
)
12063 fprintf (file
, _(" [new ABI]"));
12065 if (flags
& EF_ARM_OLD_ABI
)
12066 fprintf (file
, _(" [old ABI]"));
12068 if (flags
& EF_ARM_SOFT_FLOAT
)
12069 fprintf (file
, _(" [software FP]"));
12071 flags
&= ~(EF_ARM_INTERWORK
| EF_ARM_APCS_26
| EF_ARM_APCS_FLOAT
12072 | EF_ARM_PIC
| EF_ARM_NEW_ABI
| EF_ARM_OLD_ABI
12073 | EF_ARM_SOFT_FLOAT
| EF_ARM_VFP_FLOAT
12074 | EF_ARM_MAVERICK_FLOAT
);
12077 case EF_ARM_EABI_VER1
:
12078 fprintf (file
, _(" [Version1 EABI]"));
12080 if (flags
& EF_ARM_SYMSARESORTED
)
12081 fprintf (file
, _(" [sorted symbol table]"));
12083 fprintf (file
, _(" [unsorted symbol table]"));
12085 flags
&= ~ EF_ARM_SYMSARESORTED
;
12088 case EF_ARM_EABI_VER2
:
12089 fprintf (file
, _(" [Version2 EABI]"));
12091 if (flags
& EF_ARM_SYMSARESORTED
)
12092 fprintf (file
, _(" [sorted symbol table]"));
12094 fprintf (file
, _(" [unsorted symbol table]"));
12096 if (flags
& EF_ARM_DYNSYMSUSESEGIDX
)
12097 fprintf (file
, _(" [dynamic symbols use segment index]"));
12099 if (flags
& EF_ARM_MAPSYMSFIRST
)
12100 fprintf (file
, _(" [mapping symbols precede others]"));
12102 flags
&= ~(EF_ARM_SYMSARESORTED
| EF_ARM_DYNSYMSUSESEGIDX
12103 | EF_ARM_MAPSYMSFIRST
);
12106 case EF_ARM_EABI_VER3
:
12107 fprintf (file
, _(" [Version3 EABI]"));
12110 case EF_ARM_EABI_VER4
:
12111 fprintf (file
, _(" [Version4 EABI]"));
12114 case EF_ARM_EABI_VER5
:
12115 fprintf (file
, _(" [Version5 EABI]"));
12117 if (flags
& EF_ARM_ABI_FLOAT_SOFT
)
12118 fprintf (file
, _(" [soft-float ABI]"));
12120 if (flags
& EF_ARM_ABI_FLOAT_HARD
)
12121 fprintf (file
, _(" [hard-float ABI]"));
12123 flags
&= ~(EF_ARM_ABI_FLOAT_SOFT
| EF_ARM_ABI_FLOAT_HARD
);
12126 if (flags
& EF_ARM_BE8
)
12127 fprintf (file
, _(" [BE8]"));
12129 if (flags
& EF_ARM_LE8
)
12130 fprintf (file
, _(" [LE8]"));
12132 flags
&= ~(EF_ARM_LE8
| EF_ARM_BE8
);
12136 fprintf (file
, _(" <EABI version unrecognised>"));
12140 flags
&= ~ EF_ARM_EABIMASK
;
12142 if (flags
& EF_ARM_RELEXEC
)
12143 fprintf (file
, _(" [relocatable executable]"));
12145 if (flags
& EF_ARM_HASENTRY
)
12146 fprintf (file
, _(" [has entry point]"));
12148 flags
&= ~ (EF_ARM_RELEXEC
| EF_ARM_HASENTRY
);
12151 fprintf (file
, _("<Unrecognised flag bits set>"));
12153 fputc ('\n', file
);
12159 elf32_arm_get_symbol_type (Elf_Internal_Sym
* elf_sym
, int type
)
12161 switch (ELF_ST_TYPE (elf_sym
->st_info
))
12163 case STT_ARM_TFUNC
:
12164 return ELF_ST_TYPE (elf_sym
->st_info
);
12166 case STT_ARM_16BIT
:
12167 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
12168 This allows us to distinguish between data used by Thumb instructions
12169 and non-data (which is probably code) inside Thumb regions of an
12171 if (type
!= STT_OBJECT
&& type
!= STT_TLS
)
12172 return ELF_ST_TYPE (elf_sym
->st_info
);
12183 elf32_arm_gc_mark_hook (asection
*sec
,
12184 struct bfd_link_info
*info
,
12185 Elf_Internal_Rela
*rel
,
12186 struct elf_link_hash_entry
*h
,
12187 Elf_Internal_Sym
*sym
)
12190 switch (ELF32_R_TYPE (rel
->r_info
))
12192 case R_ARM_GNU_VTINHERIT
:
12193 case R_ARM_GNU_VTENTRY
:
12197 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
12200 /* Update the got entry reference counts for the section being removed. */
12203 elf32_arm_gc_sweep_hook (bfd
* abfd
,
12204 struct bfd_link_info
* info
,
12206 const Elf_Internal_Rela
* relocs
)
12208 Elf_Internal_Shdr
*symtab_hdr
;
12209 struct elf_link_hash_entry
**sym_hashes
;
12210 bfd_signed_vma
*local_got_refcounts
;
12211 const Elf_Internal_Rela
*rel
, *relend
;
12212 struct elf32_arm_link_hash_table
* globals
;
12214 if (info
->relocatable
)
12217 globals
= elf32_arm_hash_table (info
);
12218 if (globals
== NULL
)
12221 elf_section_data (sec
)->local_dynrel
= NULL
;
12223 symtab_hdr
= & elf_symtab_hdr (abfd
);
12224 sym_hashes
= elf_sym_hashes (abfd
);
12225 local_got_refcounts
= elf_local_got_refcounts (abfd
);
12227 check_use_blx (globals
);
12229 relend
= relocs
+ sec
->reloc_count
;
12230 for (rel
= relocs
; rel
< relend
; rel
++)
12232 unsigned long r_symndx
;
12233 struct elf_link_hash_entry
*h
= NULL
;
12234 struct elf32_arm_link_hash_entry
*eh
;
12236 bfd_boolean call_reloc_p
;
12237 bfd_boolean may_become_dynamic_p
;
12238 bfd_boolean may_need_local_target_p
;
12239 union gotplt_union
*root_plt
;
12240 struct arm_plt_info
*arm_plt
;
12242 r_symndx
= ELF32_R_SYM (rel
->r_info
);
12243 if (r_symndx
>= symtab_hdr
->sh_info
)
12245 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
12246 while (h
->root
.type
== bfd_link_hash_indirect
12247 || h
->root
.type
== bfd_link_hash_warning
)
12248 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12250 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12252 call_reloc_p
= FALSE
;
12253 may_become_dynamic_p
= FALSE
;
12254 may_need_local_target_p
= FALSE
;
12256 r_type
= ELF32_R_TYPE (rel
->r_info
);
12257 r_type
= arm_real_reloc_type (globals
, r_type
);
12261 case R_ARM_GOT_PREL
:
12262 case R_ARM_TLS_GD32
:
12263 case R_ARM_TLS_IE32
:
12266 if (h
->got
.refcount
> 0)
12267 h
->got
.refcount
-= 1;
12269 else if (local_got_refcounts
!= NULL
)
12271 if (local_got_refcounts
[r_symndx
] > 0)
12272 local_got_refcounts
[r_symndx
] -= 1;
12276 case R_ARM_TLS_LDM32
:
12277 globals
->tls_ldm_got
.refcount
-= 1;
12285 case R_ARM_THM_CALL
:
12286 case R_ARM_THM_JUMP24
:
12287 case R_ARM_THM_JUMP19
:
12288 call_reloc_p
= TRUE
;
12289 may_need_local_target_p
= TRUE
;
12293 if (!globals
->vxworks_p
)
12295 may_need_local_target_p
= TRUE
;
12298 /* Fall through. */
12300 case R_ARM_ABS32_NOI
:
12302 case R_ARM_REL32_NOI
:
12303 case R_ARM_MOVW_ABS_NC
:
12304 case R_ARM_MOVT_ABS
:
12305 case R_ARM_MOVW_PREL_NC
:
12306 case R_ARM_MOVT_PREL
:
12307 case R_ARM_THM_MOVW_ABS_NC
:
12308 case R_ARM_THM_MOVT_ABS
:
12309 case R_ARM_THM_MOVW_PREL_NC
:
12310 case R_ARM_THM_MOVT_PREL
:
12311 /* Should the interworking branches be here also? */
12312 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
12313 && (sec
->flags
& SEC_ALLOC
) != 0)
12316 && (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
))
12318 call_reloc_p
= TRUE
;
12319 may_need_local_target_p
= TRUE
;
12322 may_become_dynamic_p
= TRUE
;
12325 may_need_local_target_p
= TRUE
;
12332 if (may_need_local_target_p
12333 && elf32_arm_get_plt_info (abfd
, eh
, r_symndx
, &root_plt
, &arm_plt
))
12335 /* If PLT refcount book-keeping is wrong and too low, we'll
12336 see a zero value (going to -1) for the root PLT reference
12338 if (root_plt
->refcount
>= 0)
12340 BFD_ASSERT (root_plt
->refcount
!= 0);
12341 root_plt
->refcount
-= 1;
12344 /* A value of -1 means the symbol has become local, forced
12345 or seeing a hidden definition. Any other negative value
12347 BFD_ASSERT (root_plt
->refcount
== -1);
12350 arm_plt
->noncall_refcount
--;
12352 if (r_type
== R_ARM_THM_CALL
)
12353 arm_plt
->maybe_thumb_refcount
--;
12355 if (r_type
== R_ARM_THM_JUMP24
12356 || r_type
== R_ARM_THM_JUMP19
)
12357 arm_plt
->thumb_refcount
--;
12360 if (may_become_dynamic_p
)
12362 struct elf_dyn_relocs
**pp
;
12363 struct elf_dyn_relocs
*p
;
12366 pp
= &(eh
->dyn_relocs
);
12369 Elf_Internal_Sym
*isym
;
12371 isym
= bfd_sym_from_r_symndx (&globals
->sym_cache
,
12375 pp
= elf32_arm_get_local_dynreloc_list (abfd
, r_symndx
, isym
);
12379 for (; (p
= *pp
) != NULL
; pp
= &p
->next
)
12382 /* Everything must go for SEC. */
12392 /* Look through the relocs for a section during the first phase. */
12395 elf32_arm_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
12396 asection
*sec
, const Elf_Internal_Rela
*relocs
)
12398 Elf_Internal_Shdr
*symtab_hdr
;
12399 struct elf_link_hash_entry
**sym_hashes
;
12400 const Elf_Internal_Rela
*rel
;
12401 const Elf_Internal_Rela
*rel_end
;
12404 struct elf32_arm_link_hash_table
*htab
;
12405 bfd_boolean call_reloc_p
;
12406 bfd_boolean may_become_dynamic_p
;
12407 bfd_boolean may_need_local_target_p
;
12408 unsigned long nsyms
;
12410 if (info
->relocatable
)
12413 BFD_ASSERT (is_arm_elf (abfd
));
12415 htab
= elf32_arm_hash_table (info
);
12421 /* Create dynamic sections for relocatable executables so that we can
12422 copy relocations. */
12423 if (htab
->root
.is_relocatable_executable
12424 && ! htab
->root
.dynamic_sections_created
)
12426 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
12430 if (htab
->root
.dynobj
== NULL
)
12431 htab
->root
.dynobj
= abfd
;
12432 if (!create_ifunc_sections (info
))
12435 dynobj
= htab
->root
.dynobj
;
12437 symtab_hdr
= & elf_symtab_hdr (abfd
);
12438 sym_hashes
= elf_sym_hashes (abfd
);
12439 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
12441 rel_end
= relocs
+ sec
->reloc_count
;
12442 for (rel
= relocs
; rel
< rel_end
; rel
++)
12444 Elf_Internal_Sym
*isym
;
12445 struct elf_link_hash_entry
*h
;
12446 struct elf32_arm_link_hash_entry
*eh
;
12447 unsigned long r_symndx
;
12450 r_symndx
= ELF32_R_SYM (rel
->r_info
);
12451 r_type
= ELF32_R_TYPE (rel
->r_info
);
12452 r_type
= arm_real_reloc_type (htab
, r_type
);
12454 if (r_symndx
>= nsyms
12455 /* PR 9934: It is possible to have relocations that do not
12456 refer to symbols, thus it is also possible to have an
12457 object file containing relocations but no symbol table. */
12458 && (r_symndx
> STN_UNDEF
|| nsyms
> 0))
12460 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"), abfd
,
12469 if (r_symndx
< symtab_hdr
->sh_info
)
12471 /* A local symbol. */
12472 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
12479 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
12480 while (h
->root
.type
== bfd_link_hash_indirect
12481 || h
->root
.type
== bfd_link_hash_warning
)
12482 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12486 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12488 call_reloc_p
= FALSE
;
12489 may_become_dynamic_p
= FALSE
;
12490 may_need_local_target_p
= FALSE
;
12492 /* Could be done earlier, if h were already available. */
12493 r_type
= elf32_arm_tls_transition (info
, r_type
, h
);
12497 case R_ARM_GOT_PREL
:
12498 case R_ARM_TLS_GD32
:
12499 case R_ARM_TLS_IE32
:
12500 case R_ARM_TLS_GOTDESC
:
12501 case R_ARM_TLS_DESCSEQ
:
12502 case R_ARM_THM_TLS_DESCSEQ
:
12503 case R_ARM_TLS_CALL
:
12504 case R_ARM_THM_TLS_CALL
:
12505 /* This symbol requires a global offset table entry. */
12507 int tls_type
, old_tls_type
;
12511 case R_ARM_TLS_GD32
: tls_type
= GOT_TLS_GD
; break;
12513 case R_ARM_TLS_IE32
: tls_type
= GOT_TLS_IE
; break;
12515 case R_ARM_TLS_GOTDESC
:
12516 case R_ARM_TLS_CALL
: case R_ARM_THM_TLS_CALL
:
12517 case R_ARM_TLS_DESCSEQ
: case R_ARM_THM_TLS_DESCSEQ
:
12518 tls_type
= GOT_TLS_GDESC
; break;
12520 default: tls_type
= GOT_NORMAL
; break;
12526 old_tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
12530 /* This is a global offset table entry for a local symbol. */
12531 if (!elf32_arm_allocate_local_sym_info (abfd
))
12533 elf_local_got_refcounts (abfd
)[r_symndx
] += 1;
12534 old_tls_type
= elf32_arm_local_got_tls_type (abfd
) [r_symndx
];
12537 /* If a variable is accessed with both tls methods, two
12538 slots may be created. */
12539 if (GOT_TLS_GD_ANY_P (old_tls_type
)
12540 && GOT_TLS_GD_ANY_P (tls_type
))
12541 tls_type
|= old_tls_type
;
12543 /* We will already have issued an error message if there
12544 is a TLS/non-TLS mismatch, based on the symbol
12545 type. So just combine any TLS types needed. */
12546 if (old_tls_type
!= GOT_UNKNOWN
&& old_tls_type
!= GOT_NORMAL
12547 && tls_type
!= GOT_NORMAL
)
12548 tls_type
|= old_tls_type
;
12550 /* If the symbol is accessed in both IE and GDESC
12551 method, we're able to relax. Turn off the GDESC flag,
12552 without messing up with any other kind of tls types
12553 that may be involved */
12554 if ((tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_GDESC
))
12555 tls_type
&= ~GOT_TLS_GDESC
;
12557 if (old_tls_type
!= tls_type
)
12560 elf32_arm_hash_entry (h
)->tls_type
= tls_type
;
12562 elf32_arm_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
12565 /* Fall through. */
12567 case R_ARM_TLS_LDM32
:
12568 if (r_type
== R_ARM_TLS_LDM32
)
12569 htab
->tls_ldm_got
.refcount
++;
12570 /* Fall through. */
12572 case R_ARM_GOTOFF32
:
12574 if (htab
->root
.sgot
== NULL
12575 && !create_got_section (htab
->root
.dynobj
, info
))
12584 case R_ARM_THM_CALL
:
12585 case R_ARM_THM_JUMP24
:
12586 case R_ARM_THM_JUMP19
:
12587 call_reloc_p
= TRUE
;
12588 may_need_local_target_p
= TRUE
;
12592 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
12593 ldr __GOTT_INDEX__ offsets. */
12594 if (!htab
->vxworks_p
)
12596 may_need_local_target_p
= TRUE
;
12599 /* Fall through. */
12601 case R_ARM_MOVW_ABS_NC
:
12602 case R_ARM_MOVT_ABS
:
12603 case R_ARM_THM_MOVW_ABS_NC
:
12604 case R_ARM_THM_MOVT_ABS
:
12607 (*_bfd_error_handler
)
12608 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
12609 abfd
, elf32_arm_howto_table_1
[r_type
].name
,
12610 (h
) ? h
->root
.root
.string
: "a local symbol");
12611 bfd_set_error (bfd_error_bad_value
);
12615 /* Fall through. */
12617 case R_ARM_ABS32_NOI
:
12619 case R_ARM_REL32_NOI
:
12620 case R_ARM_MOVW_PREL_NC
:
12621 case R_ARM_MOVT_PREL
:
12622 case R_ARM_THM_MOVW_PREL_NC
:
12623 case R_ARM_THM_MOVT_PREL
:
12625 /* Should the interworking branches be listed here? */
12626 if ((info
->shared
|| htab
->root
.is_relocatable_executable
)
12627 && (sec
->flags
& SEC_ALLOC
) != 0)
12630 && (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
))
12632 /* In shared libraries and relocatable executables,
12633 we treat local relative references as calls;
12634 see the related SYMBOL_CALLS_LOCAL code in
12635 allocate_dynrelocs. */
12636 call_reloc_p
= TRUE
;
12637 may_need_local_target_p
= TRUE
;
12640 /* We are creating a shared library or relocatable
12641 executable, and this is a reloc against a global symbol,
12642 or a non-PC-relative reloc against a local symbol.
12643 We may need to copy the reloc into the output. */
12644 may_become_dynamic_p
= TRUE
;
12647 may_need_local_target_p
= TRUE
;
12650 /* This relocation describes the C++ object vtable hierarchy.
12651 Reconstruct it for later use during GC. */
12652 case R_ARM_GNU_VTINHERIT
:
12653 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
12657 /* This relocation describes which C++ vtable entries are actually
12658 used. Record for later use during GC. */
12659 case R_ARM_GNU_VTENTRY
:
12660 BFD_ASSERT (h
!= NULL
);
12662 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
12670 /* We may need a .plt entry if the function this reloc
12671 refers to is in a different object, regardless of the
12672 symbol's type. We can't tell for sure yet, because
12673 something later might force the symbol local. */
12675 else if (may_need_local_target_p
)
12676 /* If this reloc is in a read-only section, we might
12677 need a copy reloc. We can't check reliably at this
12678 stage whether the section is read-only, as input
12679 sections have not yet been mapped to output sections.
12680 Tentatively set the flag for now, and correct in
12681 adjust_dynamic_symbol. */
12682 h
->non_got_ref
= 1;
12685 if (may_need_local_target_p
12686 && (h
!= NULL
|| ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
))
12688 union gotplt_union
*root_plt
;
12689 struct arm_plt_info
*arm_plt
;
12690 struct arm_local_iplt_info
*local_iplt
;
12694 root_plt
= &h
->plt
;
12695 arm_plt
= &eh
->plt
;
12699 local_iplt
= elf32_arm_create_local_iplt (abfd
, r_symndx
);
12700 if (local_iplt
== NULL
)
12702 root_plt
= &local_iplt
->root
;
12703 arm_plt
= &local_iplt
->arm
;
12706 /* If the symbol is a function that doesn't bind locally,
12707 this relocation will need a PLT entry. */
12708 if (root_plt
->refcount
!= -1)
12709 root_plt
->refcount
+= 1;
12712 arm_plt
->noncall_refcount
++;
12714 /* It's too early to use htab->use_blx here, so we have to
12715 record possible blx references separately from
12716 relocs that definitely need a thumb stub. */
12718 if (r_type
== R_ARM_THM_CALL
)
12719 arm_plt
->maybe_thumb_refcount
+= 1;
12721 if (r_type
== R_ARM_THM_JUMP24
12722 || r_type
== R_ARM_THM_JUMP19
)
12723 arm_plt
->thumb_refcount
+= 1;
12726 if (may_become_dynamic_p
)
12728 struct elf_dyn_relocs
*p
, **head
;
12730 /* Create a reloc section in dynobj. */
12731 if (sreloc
== NULL
)
12733 sreloc
= _bfd_elf_make_dynamic_reloc_section
12734 (sec
, dynobj
, 2, abfd
, ! htab
->use_rel
);
12736 if (sreloc
== NULL
)
12739 /* BPABI objects never have dynamic relocations mapped. */
12740 if (htab
->symbian_p
)
12744 flags
= bfd_get_section_flags (dynobj
, sreloc
);
12745 flags
&= ~(SEC_LOAD
| SEC_ALLOC
);
12746 bfd_set_section_flags (dynobj
, sreloc
, flags
);
12750 /* If this is a global symbol, count the number of
12751 relocations we need for this symbol. */
12753 head
= &((struct elf32_arm_link_hash_entry
*) h
)->dyn_relocs
;
12756 head
= elf32_arm_get_local_dynreloc_list (abfd
, r_symndx
, isym
);
12762 if (p
== NULL
|| p
->sec
!= sec
)
12764 bfd_size_type amt
= sizeof *p
;
12766 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->root
.dynobj
, amt
);
12776 if (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
)
12785 /* Unwinding tables are not referenced directly. This pass marks them as
12786 required if the corresponding code section is marked. */
12789 elf32_arm_gc_mark_extra_sections (struct bfd_link_info
*info
,
12790 elf_gc_mark_hook_fn gc_mark_hook
)
12793 Elf_Internal_Shdr
**elf_shdrp
;
12796 _bfd_elf_gc_mark_extra_sections (info
, gc_mark_hook
);
12798 /* Marking EH data may cause additional code sections to be marked,
12799 requiring multiple passes. */
12804 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12808 if (! is_arm_elf (sub
))
12811 elf_shdrp
= elf_elfsections (sub
);
12812 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
12814 Elf_Internal_Shdr
*hdr
;
12816 hdr
= &elf_section_data (o
)->this_hdr
;
12817 if (hdr
->sh_type
== SHT_ARM_EXIDX
12819 && hdr
->sh_link
< elf_numsections (sub
)
12821 && elf_shdrp
[hdr
->sh_link
]->bfd_section
->gc_mark
)
12824 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
12834 /* Treat mapping symbols as special target symbols. */
12837 elf32_arm_is_target_special_symbol (bfd
* abfd ATTRIBUTE_UNUSED
, asymbol
* sym
)
12839 return bfd_is_arm_special_symbol_name (sym
->name
,
12840 BFD_ARM_SPECIAL_SYM_TYPE_ANY
);
12843 /* This is a copy of elf_find_function() from elf.c except that
12844 ARM mapping symbols are ignored when looking for function names
12845 and STT_ARM_TFUNC is considered to a function type. */
12848 arm_elf_find_function (bfd
* abfd ATTRIBUTE_UNUSED
,
12849 asection
* section
,
12850 asymbol
** symbols
,
12852 const char ** filename_ptr
,
12853 const char ** functionname_ptr
)
12855 const char * filename
= NULL
;
12856 asymbol
* func
= NULL
;
12857 bfd_vma low_func
= 0;
12860 for (p
= symbols
; *p
!= NULL
; p
++)
12862 elf_symbol_type
*q
;
12864 q
= (elf_symbol_type
*) *p
;
12866 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
12871 filename
= bfd_asymbol_name (&q
->symbol
);
12874 case STT_ARM_TFUNC
:
12876 /* Skip mapping symbols. */
12877 if ((q
->symbol
.flags
& BSF_LOCAL
)
12878 && bfd_is_arm_special_symbol_name (q
->symbol
.name
,
12879 BFD_ARM_SPECIAL_SYM_TYPE_ANY
))
12881 /* Fall through. */
12882 if (bfd_get_section (&q
->symbol
) == section
12883 && q
->symbol
.value
>= low_func
12884 && q
->symbol
.value
<= offset
)
12886 func
= (asymbol
*) q
;
12887 low_func
= q
->symbol
.value
;
12897 *filename_ptr
= filename
;
12898 if (functionname_ptr
)
12899 *functionname_ptr
= bfd_asymbol_name (func
);
12905 /* Find the nearest line to a particular section and offset, for error
12906 reporting. This code is a duplicate of the code in elf.c, except
12907 that it uses arm_elf_find_function. */
12910 elf32_arm_find_nearest_line (bfd
* abfd
,
12911 asection
* section
,
12912 asymbol
** symbols
,
12914 const char ** filename_ptr
,
12915 const char ** functionname_ptr
,
12916 unsigned int * line_ptr
)
12918 bfd_boolean found
= FALSE
;
12920 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
12922 if (_bfd_dwarf2_find_nearest_line (abfd
, dwarf_debug_sections
,
12923 section
, symbols
, offset
,
12924 filename_ptr
, functionname_ptr
,
12926 & elf_tdata (abfd
)->dwarf2_find_line_info
))
12928 if (!*functionname_ptr
)
12929 arm_elf_find_function (abfd
, section
, symbols
, offset
,
12930 *filename_ptr
? NULL
: filename_ptr
,
12936 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
12937 & found
, filename_ptr
,
12938 functionname_ptr
, line_ptr
,
12939 & elf_tdata (abfd
)->line_info
))
12942 if (found
&& (*functionname_ptr
|| *line_ptr
))
12945 if (symbols
== NULL
)
12948 if (! arm_elf_find_function (abfd
, section
, symbols
, offset
,
12949 filename_ptr
, functionname_ptr
))
12957 elf32_arm_find_inliner_info (bfd
* abfd
,
12958 const char ** filename_ptr
,
12959 const char ** functionname_ptr
,
12960 unsigned int * line_ptr
)
12963 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
12964 functionname_ptr
, line_ptr
,
12965 & elf_tdata (abfd
)->dwarf2_find_line_info
);
12969 /* Adjust a symbol defined by a dynamic object and referenced by a
12970 regular object. The current definition is in some section of the
12971 dynamic object, but we're not including those sections. We have to
12972 change the definition to something the rest of the link can
12976 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info
* info
,
12977 struct elf_link_hash_entry
* h
)
12981 struct elf32_arm_link_hash_entry
* eh
;
12982 struct elf32_arm_link_hash_table
*globals
;
12984 globals
= elf32_arm_hash_table (info
);
12985 if (globals
== NULL
)
12988 dynobj
= elf_hash_table (info
)->dynobj
;
12990 /* Make sure we know what is going on here. */
12991 BFD_ASSERT (dynobj
!= NULL
12993 || h
->type
== STT_GNU_IFUNC
12994 || h
->u
.weakdef
!= NULL
12997 && !h
->def_regular
)));
12999 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13001 /* If this is a function, put it in the procedure linkage table. We
13002 will fill in the contents of the procedure linkage table later,
13003 when we know the address of the .got section. */
13004 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
13006 /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
13007 symbol binds locally. */
13008 if (h
->plt
.refcount
<= 0
13009 || (h
->type
!= STT_GNU_IFUNC
13010 && (SYMBOL_CALLS_LOCAL (info
, h
)
13011 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
13012 && h
->root
.type
== bfd_link_hash_undefweak
))))
13014 /* This case can occur if we saw a PLT32 reloc in an input
13015 file, but the symbol was never referred to by a dynamic
13016 object, or if all references were garbage collected. In
13017 such a case, we don't actually need to build a procedure
13018 linkage table, and we can just do a PC24 reloc instead. */
13019 h
->plt
.offset
= (bfd_vma
) -1;
13020 eh
->plt
.thumb_refcount
= 0;
13021 eh
->plt
.maybe_thumb_refcount
= 0;
13022 eh
->plt
.noncall_refcount
= 0;
13030 /* It's possible that we incorrectly decided a .plt reloc was
13031 needed for an R_ARM_PC24 or similar reloc to a non-function sym
13032 in check_relocs. We can't decide accurately between function
13033 and non-function syms in check-relocs; Objects loaded later in
13034 the link may change h->type. So fix it now. */
13035 h
->plt
.offset
= (bfd_vma
) -1;
13036 eh
->plt
.thumb_refcount
= 0;
13037 eh
->plt
.maybe_thumb_refcount
= 0;
13038 eh
->plt
.noncall_refcount
= 0;
13041 /* If this is a weak symbol, and there is a real definition, the
13042 processor independent code will have arranged for us to see the
13043 real definition first, and we can just use the same value. */
13044 if (h
->u
.weakdef
!= NULL
)
13046 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
13047 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
13048 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
13049 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
13053 /* If there are no non-GOT references, we do not need a copy
13055 if (!h
->non_got_ref
)
13058 /* This is a reference to a symbol defined by a dynamic object which
13059 is not a function. */
13061 /* If we are creating a shared library, we must presume that the
13062 only references to the symbol are via the global offset table.
13063 For such cases we need not do anything here; the relocations will
13064 be handled correctly by relocate_section. Relocatable executables
13065 can reference data in shared objects directly, so we don't need to
13066 do anything here. */
13067 if (info
->shared
|| globals
->root
.is_relocatable_executable
)
13070 /* We must allocate the symbol in our .dynbss section, which will
13071 become part of the .bss section of the executable. There will be
13072 an entry for this symbol in the .dynsym section. The dynamic
13073 object will contain position independent code, so all references
13074 from the dynamic object to this symbol will go through the global
13075 offset table. The dynamic linker will use the .dynsym entry to
13076 determine the address it must put in the global offset table, so
13077 both the dynamic object and the regular object will refer to the
13078 same memory location for the variable. */
13079 s
= bfd_get_linker_section (dynobj
, ".dynbss");
13080 BFD_ASSERT (s
!= NULL
);
13082 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
13083 copy the initial value out of the dynamic object and into the
13084 runtime process image. We need to remember the offset into the
13085 .rel(a).bss section we are going to use. */
13086 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
13090 srel
= bfd_get_linker_section (dynobj
, RELOC_SECTION (globals
, ".bss"));
13091 elf32_arm_allocate_dynrelocs (info
, srel
, 1);
13095 return _bfd_elf_adjust_dynamic_copy (h
, s
);
13098 /* Allocate space in .plt, .got and associated reloc sections for
13102 allocate_dynrelocs_for_symbol (struct elf_link_hash_entry
*h
, void * inf
)
13104 struct bfd_link_info
*info
;
13105 struct elf32_arm_link_hash_table
*htab
;
13106 struct elf32_arm_link_hash_entry
*eh
;
13107 struct elf_dyn_relocs
*p
;
13109 if (h
->root
.type
== bfd_link_hash_indirect
)
13112 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13114 info
= (struct bfd_link_info
*) inf
;
13115 htab
= elf32_arm_hash_table (info
);
13119 if ((htab
->root
.dynamic_sections_created
|| h
->type
== STT_GNU_IFUNC
)
13120 && h
->plt
.refcount
> 0)
13122 /* Make sure this symbol is output as a dynamic symbol.
13123 Undefined weak syms won't yet be marked as dynamic. */
13124 if (h
->dynindx
== -1
13125 && !h
->forced_local
)
13127 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13131 /* If the call in the PLT entry binds locally, the associated
13132 GOT entry should use an R_ARM_IRELATIVE relocation instead of
13133 the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather
13134 than the .plt section. */
13135 if (h
->type
== STT_GNU_IFUNC
&& SYMBOL_CALLS_LOCAL (info
, h
))
13138 if (eh
->plt
.noncall_refcount
== 0
13139 && SYMBOL_REFERENCES_LOCAL (info
, h
))
13140 /* All non-call references can be resolved directly.
13141 This means that they can (and in some cases, must)
13142 resolve directly to the run-time target, rather than
13143 to the PLT. That in turns means that any .got entry
13144 would be equal to the .igot.plt entry, so there's
13145 no point having both. */
13146 h
->got
.refcount
= 0;
13151 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
13153 elf32_arm_allocate_plt_entry (info
, eh
->is_iplt
, &h
->plt
, &eh
->plt
);
13155 /* If this symbol is not defined in a regular file, and we are
13156 not generating a shared library, then set the symbol to this
13157 location in the .plt. This is required to make function
13158 pointers compare as equal between the normal executable and
13159 the shared library. */
13161 && !h
->def_regular
)
13163 h
->root
.u
.def
.section
= htab
->root
.splt
;
13164 h
->root
.u
.def
.value
= h
->plt
.offset
;
13166 /* Make sure the function is not marked as Thumb, in case
13167 it is the target of an ABS32 relocation, which will
13168 point to the PLT entry. */
13169 h
->target_internal
= ST_BRANCH_TO_ARM
;
13172 htab
->next_tls_desc_index
++;
13174 /* VxWorks executables have a second set of relocations for
13175 each PLT entry. They go in a separate relocation section,
13176 which is processed by the kernel loader. */
13177 if (htab
->vxworks_p
&& !info
->shared
)
13179 /* There is a relocation for the initial PLT entry:
13180 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
13181 if (h
->plt
.offset
== htab
->plt_header_size
)
13182 elf32_arm_allocate_dynrelocs (info
, htab
->srelplt2
, 1);
13184 /* There are two extra relocations for each subsequent
13185 PLT entry: an R_ARM_32 relocation for the GOT entry,
13186 and an R_ARM_32 relocation for the PLT entry. */
13187 elf32_arm_allocate_dynrelocs (info
, htab
->srelplt2
, 2);
13192 h
->plt
.offset
= (bfd_vma
) -1;
13198 h
->plt
.offset
= (bfd_vma
) -1;
13202 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13203 eh
->tlsdesc_got
= (bfd_vma
) -1;
13205 if (h
->got
.refcount
> 0)
13209 int tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
13212 /* Make sure this symbol is output as a dynamic symbol.
13213 Undefined weak syms won't yet be marked as dynamic. */
13214 if (h
->dynindx
== -1
13215 && !h
->forced_local
)
13217 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13221 if (!htab
->symbian_p
)
13223 s
= htab
->root
.sgot
;
13224 h
->got
.offset
= s
->size
;
13226 if (tls_type
== GOT_UNKNOWN
)
13229 if (tls_type
== GOT_NORMAL
)
13230 /* Non-TLS symbols need one GOT slot. */
13234 if (tls_type
& GOT_TLS_GDESC
)
13236 /* R_ARM_TLS_DESC needs 2 GOT slots. */
13238 = (htab
->root
.sgotplt
->size
13239 - elf32_arm_compute_jump_table_size (htab
));
13240 htab
->root
.sgotplt
->size
+= 8;
13241 h
->got
.offset
= (bfd_vma
) -2;
13242 /* plt.got_offset needs to know there's a TLS_DESC
13243 reloc in the middle of .got.plt. */
13244 htab
->num_tls_desc
++;
13247 if (tls_type
& GOT_TLS_GD
)
13249 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. If
13250 the symbol is both GD and GDESC, got.offset may
13251 have been overwritten. */
13252 h
->got
.offset
= s
->size
;
13256 if (tls_type
& GOT_TLS_IE
)
13257 /* R_ARM_TLS_IE32 needs one GOT slot. */
13261 dyn
= htab
->root
.dynamic_sections_created
;
13264 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
13266 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
13269 if (tls_type
!= GOT_NORMAL
13270 && (info
->shared
|| indx
!= 0)
13271 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
13272 || h
->root
.type
!= bfd_link_hash_undefweak
))
13274 if (tls_type
& GOT_TLS_IE
)
13275 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13277 if (tls_type
& GOT_TLS_GD
)
13278 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13280 if (tls_type
& GOT_TLS_GDESC
)
13282 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
13283 /* GDESC needs a trampoline to jump to. */
13284 htab
->tls_trampoline
= -1;
13287 /* Only GD needs it. GDESC just emits one relocation per
13289 if ((tls_type
& GOT_TLS_GD
) && indx
!= 0)
13290 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13292 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
))
13294 if (htab
->root
.dynamic_sections_created
)
13295 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
13296 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13298 else if (h
->type
== STT_GNU_IFUNC
13299 && eh
->plt
.noncall_refcount
== 0)
13300 /* No non-call references resolve the STT_GNU_IFUNC's PLT entry;
13301 they all resolve dynamically instead. Reserve room for the
13302 GOT entry's R_ARM_IRELATIVE relocation. */
13303 elf32_arm_allocate_irelocs (info
, htab
->root
.srelgot
, 1);
13304 else if (info
->shared
)
13305 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
13306 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13310 h
->got
.offset
= (bfd_vma
) -1;
13312 /* Allocate stubs for exported Thumb functions on v4t. */
13313 if (!htab
->use_blx
&& h
->dynindx
!= -1
13315 && h
->target_internal
== ST_BRANCH_TO_THUMB
13316 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
13318 struct elf_link_hash_entry
* th
;
13319 struct bfd_link_hash_entry
* bh
;
13320 struct elf_link_hash_entry
* myh
;
13324 /* Create a new symbol to regist the real location of the function. */
13325 s
= h
->root
.u
.def
.section
;
13326 sprintf (name
, "__real_%s", h
->root
.root
.string
);
13327 _bfd_generic_link_add_one_symbol (info
, s
->owner
,
13328 name
, BSF_GLOBAL
, s
,
13329 h
->root
.u
.def
.value
,
13330 NULL
, TRUE
, FALSE
, &bh
);
13332 myh
= (struct elf_link_hash_entry
*) bh
;
13333 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
13334 myh
->forced_local
= 1;
13335 myh
->target_internal
= ST_BRANCH_TO_THUMB
;
13336 eh
->export_glue
= myh
;
13337 th
= record_arm_to_thumb_glue (info
, h
);
13338 /* Point the symbol at the stub. */
13339 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
13340 h
->target_internal
= ST_BRANCH_TO_ARM
;
13341 h
->root
.u
.def
.section
= th
->root
.u
.def
.section
;
13342 h
->root
.u
.def
.value
= th
->root
.u
.def
.value
& ~1;
13345 if (eh
->dyn_relocs
== NULL
)
13348 /* In the shared -Bsymbolic case, discard space allocated for
13349 dynamic pc-relative relocs against symbols which turn out to be
13350 defined in regular objects. For the normal shared case, discard
13351 space for pc-relative relocs that have become local due to symbol
13352 visibility changes. */
13354 if (info
->shared
|| htab
->root
.is_relocatable_executable
)
13356 /* The only relocs that use pc_count are R_ARM_REL32 and
13357 R_ARM_REL32_NOI, which will appear on something like
13358 ".long foo - .". We want calls to protected symbols to resolve
13359 directly to the function rather than going via the plt. If people
13360 want function pointer comparisons to work as expected then they
13361 should avoid writing assembly like ".long foo - .". */
13362 if (SYMBOL_CALLS_LOCAL (info
, h
))
13364 struct elf_dyn_relocs
**pp
;
13366 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
13368 p
->count
-= p
->pc_count
;
13377 if (htab
->vxworks_p
)
13379 struct elf_dyn_relocs
**pp
;
13381 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
13383 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
13390 /* Also discard relocs on undefined weak syms with non-default
13392 if (eh
->dyn_relocs
!= NULL
13393 && h
->root
.type
== bfd_link_hash_undefweak
)
13395 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
13396 eh
->dyn_relocs
= NULL
;
13398 /* Make sure undefined weak symbols are output as a dynamic
13400 else if (h
->dynindx
== -1
13401 && !h
->forced_local
)
13403 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13408 else if (htab
->root
.is_relocatable_executable
&& h
->dynindx
== -1
13409 && h
->root
.type
== bfd_link_hash_new
)
13411 /* Output absolute symbols so that we can create relocations
13412 against them. For normal symbols we output a relocation
13413 against the section that contains them. */
13414 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13421 /* For the non-shared case, discard space for relocs against
13422 symbols which turn out to need copy relocs or are not
13425 if (!h
->non_got_ref
13426 && ((h
->def_dynamic
13427 && !h
->def_regular
)
13428 || (htab
->root
.dynamic_sections_created
13429 && (h
->root
.type
== bfd_link_hash_undefweak
13430 || h
->root
.type
== bfd_link_hash_undefined
))))
13432 /* Make sure this symbol is output as a dynamic symbol.
13433 Undefined weak syms won't yet be marked as dynamic. */
13434 if (h
->dynindx
== -1
13435 && !h
->forced_local
)
13437 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13441 /* If that succeeded, we know we'll be keeping all the
13443 if (h
->dynindx
!= -1)
13447 eh
->dyn_relocs
= NULL
;
13452 /* Finally, allocate space. */
13453 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13455 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
13456 if (h
->type
== STT_GNU_IFUNC
13457 && eh
->plt
.noncall_refcount
== 0
13458 && SYMBOL_REFERENCES_LOCAL (info
, h
))
13459 elf32_arm_allocate_irelocs (info
, sreloc
, p
->count
);
13461 elf32_arm_allocate_dynrelocs (info
, sreloc
, p
->count
);
13467 /* Find any dynamic relocs that apply to read-only sections. */
13470 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
13472 struct elf32_arm_link_hash_entry
* eh
;
13473 struct elf_dyn_relocs
* p
;
13475 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13476 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13478 asection
*s
= p
->sec
;
13480 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
13482 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
13484 info
->flags
|= DF_TEXTREL
;
13486 /* Not an error, just cut short the traversal. */
13494 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info
*info
,
13497 struct elf32_arm_link_hash_table
*globals
;
13499 globals
= elf32_arm_hash_table (info
);
13500 if (globals
== NULL
)
13503 globals
->byteswap_code
= byteswap_code
;
13506 /* Set the sizes of the dynamic sections. */
13509 elf32_arm_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
13510 struct bfd_link_info
* info
)
13515 bfd_boolean relocs
;
13517 struct elf32_arm_link_hash_table
*htab
;
13519 htab
= elf32_arm_hash_table (info
);
13523 dynobj
= elf_hash_table (info
)->dynobj
;
13524 BFD_ASSERT (dynobj
!= NULL
);
13525 check_use_blx (htab
);
13527 if (elf_hash_table (info
)->dynamic_sections_created
)
13529 /* Set the contents of the .interp section to the interpreter. */
13530 if (info
->executable
)
13532 s
= bfd_get_linker_section (dynobj
, ".interp");
13533 BFD_ASSERT (s
!= NULL
);
13534 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
13535 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
13539 /* Set up .got offsets for local syms, and space for local dynamic
13541 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
13543 bfd_signed_vma
*local_got
;
13544 bfd_signed_vma
*end_local_got
;
13545 struct arm_local_iplt_info
**local_iplt_ptr
, *local_iplt
;
13546 char *local_tls_type
;
13547 bfd_vma
*local_tlsdesc_gotent
;
13548 bfd_size_type locsymcount
;
13549 Elf_Internal_Shdr
*symtab_hdr
;
13551 bfd_boolean is_vxworks
= htab
->vxworks_p
;
13552 unsigned int symndx
;
13554 if (! is_arm_elf (ibfd
))
13557 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
13559 struct elf_dyn_relocs
*p
;
13561 for (p
= (struct elf_dyn_relocs
*)
13562 elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
13564 if (!bfd_is_abs_section (p
->sec
)
13565 && bfd_is_abs_section (p
->sec
->output_section
))
13567 /* Input section has been discarded, either because
13568 it is a copy of a linkonce section or due to
13569 linker script /DISCARD/, so we'll be discarding
13572 else if (is_vxworks
13573 && strcmp (p
->sec
->output_section
->name
,
13576 /* Relocations in vxworks .tls_vars sections are
13577 handled specially by the loader. */
13579 else if (p
->count
!= 0)
13581 srel
= elf_section_data (p
->sec
)->sreloc
;
13582 elf32_arm_allocate_dynrelocs (info
, srel
, p
->count
);
13583 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
13584 info
->flags
|= DF_TEXTREL
;
13589 local_got
= elf_local_got_refcounts (ibfd
);
13593 symtab_hdr
= & elf_symtab_hdr (ibfd
);
13594 locsymcount
= symtab_hdr
->sh_info
;
13595 end_local_got
= local_got
+ locsymcount
;
13596 local_iplt_ptr
= elf32_arm_local_iplt (ibfd
);
13597 local_tls_type
= elf32_arm_local_got_tls_type (ibfd
);
13598 local_tlsdesc_gotent
= elf32_arm_local_tlsdesc_gotent (ibfd
);
13600 s
= htab
->root
.sgot
;
13601 srel
= htab
->root
.srelgot
;
13602 for (; local_got
< end_local_got
;
13603 ++local_got
, ++local_iplt_ptr
, ++local_tls_type
,
13604 ++local_tlsdesc_gotent
, ++symndx
)
13606 *local_tlsdesc_gotent
= (bfd_vma
) -1;
13607 local_iplt
= *local_iplt_ptr
;
13608 if (local_iplt
!= NULL
)
13610 struct elf_dyn_relocs
*p
;
13612 if (local_iplt
->root
.refcount
> 0)
13614 elf32_arm_allocate_plt_entry (info
, TRUE
,
13617 if (local_iplt
->arm
.noncall_refcount
== 0)
13618 /* All references to the PLT are calls, so all
13619 non-call references can resolve directly to the
13620 run-time target. This means that the .got entry
13621 would be the same as the .igot.plt entry, so there's
13622 no point creating both. */
13627 BFD_ASSERT (local_iplt
->arm
.noncall_refcount
== 0);
13628 local_iplt
->root
.offset
= (bfd_vma
) -1;
13631 for (p
= local_iplt
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13635 psrel
= elf_section_data (p
->sec
)->sreloc
;
13636 if (local_iplt
->arm
.noncall_refcount
== 0)
13637 elf32_arm_allocate_irelocs (info
, psrel
, p
->count
);
13639 elf32_arm_allocate_dynrelocs (info
, psrel
, p
->count
);
13642 if (*local_got
> 0)
13644 Elf_Internal_Sym
*isym
;
13646 *local_got
= s
->size
;
13647 if (*local_tls_type
& GOT_TLS_GD
)
13648 /* TLS_GD relocs need an 8-byte structure in the GOT. */
13650 if (*local_tls_type
& GOT_TLS_GDESC
)
13652 *local_tlsdesc_gotent
= htab
->root
.sgotplt
->size
13653 - elf32_arm_compute_jump_table_size (htab
);
13654 htab
->root
.sgotplt
->size
+= 8;
13655 *local_got
= (bfd_vma
) -2;
13656 /* plt.got_offset needs to know there's a TLS_DESC
13657 reloc in the middle of .got.plt. */
13658 htab
->num_tls_desc
++;
13660 if (*local_tls_type
& GOT_TLS_IE
)
13663 if (*local_tls_type
& GOT_NORMAL
)
13665 /* If the symbol is both GD and GDESC, *local_got
13666 may have been overwritten. */
13667 *local_got
= s
->size
;
13671 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, ibfd
, symndx
);
13675 /* If all references to an STT_GNU_IFUNC PLT are calls,
13676 then all non-call references, including this GOT entry,
13677 resolve directly to the run-time target. */
13678 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
13679 && (local_iplt
== NULL
13680 || local_iplt
->arm
.noncall_refcount
== 0))
13681 elf32_arm_allocate_irelocs (info
, srel
, 1);
13682 else if ((info
->shared
&& !(*local_tls_type
& GOT_TLS_GDESC
))
13683 || *local_tls_type
& GOT_TLS_GD
)
13684 elf32_arm_allocate_dynrelocs (info
, srel
, 1);
13686 if (info
->shared
&& *local_tls_type
& GOT_TLS_GDESC
)
13688 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
13689 htab
->tls_trampoline
= -1;
13693 *local_got
= (bfd_vma
) -1;
13697 if (htab
->tls_ldm_got
.refcount
> 0)
13699 /* Allocate two GOT entries and one dynamic relocation (if necessary)
13700 for R_ARM_TLS_LDM32 relocations. */
13701 htab
->tls_ldm_got
.offset
= htab
->root
.sgot
->size
;
13702 htab
->root
.sgot
->size
+= 8;
13704 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13707 htab
->tls_ldm_got
.offset
= -1;
13709 /* Allocate global sym .plt and .got entries, and space for global
13710 sym dynamic relocs. */
13711 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs_for_symbol
, info
);
13713 /* Here we rummage through the found bfds to collect glue information. */
13714 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
13716 if (! is_arm_elf (ibfd
))
13719 /* Initialise mapping tables for code/data. */
13720 bfd_elf32_arm_init_maps (ibfd
);
13722 if (!bfd_elf32_arm_process_before_allocation (ibfd
, info
)
13723 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd
, info
))
13724 /* xgettext:c-format */
13725 _bfd_error_handler (_("Errors encountered processing file %s"),
13729 /* Allocate space for the glue sections now that we've sized them. */
13730 bfd_elf32_arm_allocate_interworking_sections (info
);
13732 /* For every jump slot reserved in the sgotplt, reloc_count is
13733 incremented. However, when we reserve space for TLS descriptors,
13734 it's not incremented, so in order to compute the space reserved
13735 for them, it suffices to multiply the reloc count by the jump
13737 if (htab
->root
.srelplt
)
13738 htab
->sgotplt_jump_table_size
= elf32_arm_compute_jump_table_size(htab
);
13740 if (htab
->tls_trampoline
)
13742 if (htab
->root
.splt
->size
== 0)
13743 htab
->root
.splt
->size
+= htab
->plt_header_size
;
13745 htab
->tls_trampoline
= htab
->root
.splt
->size
;
13746 htab
->root
.splt
->size
+= htab
->plt_entry_size
;
13748 /* If we're not using lazy TLS relocations, don't generate the
13749 PLT and GOT entries they require. */
13750 if (!(info
->flags
& DF_BIND_NOW
))
13752 htab
->dt_tlsdesc_got
= htab
->root
.sgot
->size
;
13753 htab
->root
.sgot
->size
+= 4;
13755 htab
->dt_tlsdesc_plt
= htab
->root
.splt
->size
;
13756 htab
->root
.splt
->size
+= 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline
);
13760 /* The check_relocs and adjust_dynamic_symbol entry points have
13761 determined the sizes of the various dynamic sections. Allocate
13762 memory for them. */
13765 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
13769 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
13772 /* It's OK to base decisions on the section name, because none
13773 of the dynobj section names depend upon the input files. */
13774 name
= bfd_get_section_name (dynobj
, s
);
13776 if (s
== htab
->root
.splt
)
13778 /* Remember whether there is a PLT. */
13779 plt
= s
->size
!= 0;
13781 else if (CONST_STRNEQ (name
, ".rel"))
13785 /* Remember whether there are any reloc sections other
13786 than .rel(a).plt and .rela.plt.unloaded. */
13787 if (s
!= htab
->root
.srelplt
&& s
!= htab
->srelplt2
)
13790 /* We use the reloc_count field as a counter if we need
13791 to copy relocs into the output file. */
13792 s
->reloc_count
= 0;
13795 else if (s
!= htab
->root
.sgot
13796 && s
!= htab
->root
.sgotplt
13797 && s
!= htab
->root
.iplt
13798 && s
!= htab
->root
.igotplt
13799 && s
!= htab
->sdynbss
)
13801 /* It's not one of our sections, so don't allocate space. */
13807 /* If we don't need this section, strip it from the
13808 output file. This is mostly to handle .rel(a).bss and
13809 .rel(a).plt. We must create both sections in
13810 create_dynamic_sections, because they must be created
13811 before the linker maps input sections to output
13812 sections. The linker does that before
13813 adjust_dynamic_symbol is called, and it is that
13814 function which decides whether anything needs to go
13815 into these sections. */
13816 s
->flags
|= SEC_EXCLUDE
;
13820 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
13823 /* Allocate memory for the section contents. */
13824 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
13825 if (s
->contents
== NULL
)
13829 if (elf_hash_table (info
)->dynamic_sections_created
)
13831 /* Add some entries to the .dynamic section. We fill in the
13832 values later, in elf32_arm_finish_dynamic_sections, but we
13833 must add the entries now so that we get the correct size for
13834 the .dynamic section. The DT_DEBUG entry is filled in by the
13835 dynamic linker and used by the debugger. */
13836 #define add_dynamic_entry(TAG, VAL) \
13837 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
13839 if (info
->executable
)
13841 if (!add_dynamic_entry (DT_DEBUG
, 0))
13847 if ( !add_dynamic_entry (DT_PLTGOT
, 0)
13848 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
13849 || !add_dynamic_entry (DT_PLTREL
,
13850 htab
->use_rel
? DT_REL
: DT_RELA
)
13851 || !add_dynamic_entry (DT_JMPREL
, 0))
13854 if (htab
->dt_tlsdesc_plt
&&
13855 (!add_dynamic_entry (DT_TLSDESC_PLT
,0)
13856 || !add_dynamic_entry (DT_TLSDESC_GOT
,0)))
13864 if (!add_dynamic_entry (DT_REL
, 0)
13865 || !add_dynamic_entry (DT_RELSZ
, 0)
13866 || !add_dynamic_entry (DT_RELENT
, RELOC_SIZE (htab
)))
13871 if (!add_dynamic_entry (DT_RELA
, 0)
13872 || !add_dynamic_entry (DT_RELASZ
, 0)
13873 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
13878 /* If any dynamic relocs apply to a read-only section,
13879 then we need a DT_TEXTREL entry. */
13880 if ((info
->flags
& DF_TEXTREL
) == 0)
13881 elf_link_hash_traverse (& htab
->root
, elf32_arm_readonly_dynrelocs
,
13884 if ((info
->flags
& DF_TEXTREL
) != 0)
13886 if (!add_dynamic_entry (DT_TEXTREL
, 0))
13889 if (htab
->vxworks_p
13890 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
13893 #undef add_dynamic_entry
13898 /* Size sections even though they're not dynamic. We use it to setup
13899 _TLS_MODULE_BASE_, if needed. */
13902 elf32_arm_always_size_sections (bfd
*output_bfd
,
13903 struct bfd_link_info
*info
)
13907 if (info
->relocatable
)
13910 tls_sec
= elf_hash_table (info
)->tls_sec
;
13914 struct elf_link_hash_entry
*tlsbase
;
13916 tlsbase
= elf_link_hash_lookup
13917 (elf_hash_table (info
), "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
13921 struct bfd_link_hash_entry
*bh
= NULL
;
13922 const struct elf_backend_data
*bed
13923 = get_elf_backend_data (output_bfd
);
13925 if (!(_bfd_generic_link_add_one_symbol
13926 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
13927 tls_sec
, 0, NULL
, FALSE
,
13928 bed
->collect
, &bh
)))
13931 tlsbase
->type
= STT_TLS
;
13932 tlsbase
= (struct elf_link_hash_entry
*)bh
;
13933 tlsbase
->def_regular
= 1;
13934 tlsbase
->other
= STV_HIDDEN
;
13935 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
13941 /* Finish up dynamic symbol handling. We set the contents of various
13942 dynamic sections here. */
13945 elf32_arm_finish_dynamic_symbol (bfd
* output_bfd
,
13946 struct bfd_link_info
* info
,
13947 struct elf_link_hash_entry
* h
,
13948 Elf_Internal_Sym
* sym
)
13950 struct elf32_arm_link_hash_table
*htab
;
13951 struct elf32_arm_link_hash_entry
*eh
;
13953 htab
= elf32_arm_hash_table (info
);
13957 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13959 if (h
->plt
.offset
!= (bfd_vma
) -1)
13963 BFD_ASSERT (h
->dynindx
!= -1);
13964 elf32_arm_populate_plt_entry (output_bfd
, info
, &h
->plt
, &eh
->plt
,
13968 if (!h
->def_regular
)
13970 /* Mark the symbol as undefined, rather than as defined in
13971 the .plt section. Leave the value alone. */
13972 sym
->st_shndx
= SHN_UNDEF
;
13973 /* If the symbol is weak, we do need to clear the value.
13974 Otherwise, the PLT entry would provide a definition for
13975 the symbol even if the symbol wasn't defined anywhere,
13976 and so the symbol would never be NULL. */
13977 if (!h
->ref_regular_nonweak
)
13980 else if (eh
->is_iplt
&& eh
->plt
.noncall_refcount
!= 0)
13982 /* At least one non-call relocation references this .iplt entry,
13983 so the .iplt entry is the function's canonical address. */
13984 sym
->st_info
= ELF_ST_INFO (ELF_ST_BIND (sym
->st_info
), STT_FUNC
);
13985 sym
->st_target_internal
= ST_BRANCH_TO_ARM
;
13986 sym
->st_shndx
= (_bfd_elf_section_from_bfd_section
13987 (output_bfd
, htab
->root
.iplt
->output_section
));
13988 sym
->st_value
= (h
->plt
.offset
13989 + htab
->root
.iplt
->output_section
->vma
13990 + htab
->root
.iplt
->output_offset
);
13997 Elf_Internal_Rela rel
;
13999 /* This symbol needs a copy reloc. Set it up. */
14000 BFD_ASSERT (h
->dynindx
!= -1
14001 && (h
->root
.type
== bfd_link_hash_defined
14002 || h
->root
.type
== bfd_link_hash_defweak
));
14005 BFD_ASSERT (s
!= NULL
);
14008 rel
.r_offset
= (h
->root
.u
.def
.value
14009 + h
->root
.u
.def
.section
->output_section
->vma
14010 + h
->root
.u
.def
.section
->output_offset
);
14011 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
14012 elf32_arm_add_dynreloc (output_bfd
, info
, s
, &rel
);
14015 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
14016 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
14017 to the ".got" section. */
14018 if (h
== htab
->root
.hdynamic
14019 || (!htab
->vxworks_p
&& h
== htab
->root
.hgot
))
14020 sym
->st_shndx
= SHN_ABS
;
14026 arm_put_trampoline (struct elf32_arm_link_hash_table
*htab
, bfd
*output_bfd
,
14028 const unsigned long *template, unsigned count
)
14032 for (ix
= 0; ix
!= count
; ix
++)
14034 unsigned long insn
= template[ix
];
14036 /* Emit mov pc,rx if bx is not permitted. */
14037 if (htab
->fix_v4bx
== 1 && (insn
& 0x0ffffff0) == 0x012fff10)
14038 insn
= (insn
& 0xf000000f) | 0x01a0f000;
14039 put_arm_insn (htab
, output_bfd
, insn
, (char *)contents
+ ix
*4);
14043 /* Finish up the dynamic sections. */
14046 elf32_arm_finish_dynamic_sections (bfd
* output_bfd
, struct bfd_link_info
* info
)
14051 struct elf32_arm_link_hash_table
*htab
;
14053 htab
= elf32_arm_hash_table (info
);
14057 dynobj
= elf_hash_table (info
)->dynobj
;
14059 sgot
= htab
->root
.sgotplt
;
14060 /* A broken linker script might have discarded the dynamic sections.
14061 Catch this here so that we do not seg-fault later on. */
14062 if (sgot
!= NULL
&& bfd_is_abs_section (sgot
->output_section
))
14064 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
14066 if (elf_hash_table (info
)->dynamic_sections_created
)
14069 Elf32_External_Dyn
*dyncon
, *dynconend
;
14071 splt
= htab
->root
.splt
;
14072 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
14073 BFD_ASSERT (htab
->symbian_p
|| sgot
!= NULL
);
14075 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
14076 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
14078 for (; dyncon
< dynconend
; dyncon
++)
14080 Elf_Internal_Dyn dyn
;
14084 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
14091 if (htab
->vxworks_p
14092 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
14093 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14098 goto get_vma_if_bpabi
;
14101 goto get_vma_if_bpabi
;
14104 goto get_vma_if_bpabi
;
14106 name
= ".gnu.version";
14107 goto get_vma_if_bpabi
;
14109 name
= ".gnu.version_d";
14110 goto get_vma_if_bpabi
;
14112 name
= ".gnu.version_r";
14113 goto get_vma_if_bpabi
;
14119 name
= RELOC_SECTION (htab
, ".plt");
14121 s
= bfd_get_section_by_name (output_bfd
, name
);
14124 /* PR ld/14397: Issue an error message if a required section is missing. */
14125 (*_bfd_error_handler
)
14126 (_("error: required section '%s' not found in the linker script"), name
);
14127 bfd_set_error (bfd_error_invalid_operation
);
14130 if (!htab
->symbian_p
)
14131 dyn
.d_un
.d_ptr
= s
->vma
;
14133 /* In the BPABI, tags in the PT_DYNAMIC section point
14134 at the file offset, not the memory address, for the
14135 convenience of the post linker. */
14136 dyn
.d_un
.d_ptr
= s
->filepos
;
14137 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14141 if (htab
->symbian_p
)
14146 s
= htab
->root
.srelplt
;
14147 BFD_ASSERT (s
!= NULL
);
14148 dyn
.d_un
.d_val
= s
->size
;
14149 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14154 if (!htab
->symbian_p
)
14156 /* My reading of the SVR4 ABI indicates that the
14157 procedure linkage table relocs (DT_JMPREL) should be
14158 included in the overall relocs (DT_REL). This is
14159 what Solaris does. However, UnixWare can not handle
14160 that case. Therefore, we override the DT_RELSZ entry
14161 here to make it not include the JMPREL relocs. Since
14162 the linker script arranges for .rel(a).plt to follow all
14163 other relocation sections, we don't have to worry
14164 about changing the DT_REL entry. */
14165 s
= htab
->root
.srelplt
;
14167 dyn
.d_un
.d_val
-= s
->size
;
14168 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14171 /* Fall through. */
14175 /* In the BPABI, the DT_REL tag must point at the file
14176 offset, not the VMA, of the first relocation
14177 section. So, we use code similar to that in
14178 elflink.c, but do not check for SHF_ALLOC on the
14179 relcoation section, since relocations sections are
14180 never allocated under the BPABI. The comments above
14181 about Unixware notwithstanding, we include all of the
14182 relocations here. */
14183 if (htab
->symbian_p
)
14186 type
= ((dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
14187 ? SHT_REL
: SHT_RELA
);
14188 dyn
.d_un
.d_val
= 0;
14189 for (i
= 1; i
< elf_numsections (output_bfd
); i
++)
14191 Elf_Internal_Shdr
*hdr
14192 = elf_elfsections (output_bfd
)[i
];
14193 if (hdr
->sh_type
== type
)
14195 if (dyn
.d_tag
== DT_RELSZ
14196 || dyn
.d_tag
== DT_RELASZ
)
14197 dyn
.d_un
.d_val
+= hdr
->sh_size
;
14198 else if ((ufile_ptr
) hdr
->sh_offset
14199 <= dyn
.d_un
.d_val
- 1)
14200 dyn
.d_un
.d_val
= hdr
->sh_offset
;
14203 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14207 case DT_TLSDESC_PLT
:
14208 s
= htab
->root
.splt
;
14209 dyn
.d_un
.d_ptr
= (s
->output_section
->vma
+ s
->output_offset
14210 + htab
->dt_tlsdesc_plt
);
14211 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14214 case DT_TLSDESC_GOT
:
14215 s
= htab
->root
.sgot
;
14216 dyn
.d_un
.d_ptr
= (s
->output_section
->vma
+ s
->output_offset
14217 + htab
->dt_tlsdesc_got
);
14218 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14221 /* Set the bottom bit of DT_INIT/FINI if the
14222 corresponding function is Thumb. */
14224 name
= info
->init_function
;
14227 name
= info
->fini_function
;
14229 /* If it wasn't set by elf_bfd_final_link
14230 then there is nothing to adjust. */
14231 if (dyn
.d_un
.d_val
!= 0)
14233 struct elf_link_hash_entry
* eh
;
14235 eh
= elf_link_hash_lookup (elf_hash_table (info
), name
,
14236 FALSE
, FALSE
, TRUE
);
14237 if (eh
!= NULL
&& eh
->target_internal
== ST_BRANCH_TO_THUMB
)
14239 dyn
.d_un
.d_val
|= 1;
14240 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14247 /* Fill in the first entry in the procedure linkage table. */
14248 if (splt
->size
> 0 && htab
->plt_header_size
)
14250 const bfd_vma
*plt0_entry
;
14251 bfd_vma got_address
, plt_address
, got_displacement
;
14253 /* Calculate the addresses of the GOT and PLT. */
14254 got_address
= sgot
->output_section
->vma
+ sgot
->output_offset
;
14255 plt_address
= splt
->output_section
->vma
+ splt
->output_offset
;
14257 if (htab
->vxworks_p
)
14259 /* The VxWorks GOT is relocated by the dynamic linker.
14260 Therefore, we must emit relocations rather than simply
14261 computing the values now. */
14262 Elf_Internal_Rela rel
;
14264 plt0_entry
= elf32_arm_vxworks_exec_plt0_entry
;
14265 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
14266 splt
->contents
+ 0);
14267 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
14268 splt
->contents
+ 4);
14269 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
14270 splt
->contents
+ 8);
14271 bfd_put_32 (output_bfd
, got_address
, splt
->contents
+ 12);
14273 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
14274 rel
.r_offset
= plt_address
+ 12;
14275 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
14277 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
,
14278 htab
->srelplt2
->contents
);
14280 else if (htab
->nacl_p
)
14284 got_displacement
= got_address
+ 8 - (plt_address
+ 16);
14286 put_arm_insn (htab
, output_bfd
,
14287 elf32_arm_nacl_plt0_entry
[0]
14288 | arm_movw_immediate (got_displacement
),
14289 splt
->contents
+ 0);
14290 put_arm_insn (htab
, output_bfd
,
14291 elf32_arm_nacl_plt0_entry
[1]
14292 | arm_movt_immediate (got_displacement
),
14293 splt
->contents
+ 4);
14294 for (i
= 2; i
< ARRAY_SIZE (elf32_arm_nacl_plt0_entry
); ++i
)
14295 put_arm_insn (htab
, output_bfd
,
14296 elf32_arm_nacl_plt0_entry
[i
],
14297 splt
->contents
+ (i
* 4));
14301 got_displacement
= got_address
- (plt_address
+ 16);
14303 plt0_entry
= elf32_arm_plt0_entry
;
14304 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
14305 splt
->contents
+ 0);
14306 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
14307 splt
->contents
+ 4);
14308 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
14309 splt
->contents
+ 8);
14310 put_arm_insn (htab
, output_bfd
, plt0_entry
[3],
14311 splt
->contents
+ 12);
14313 #ifdef FOUR_WORD_PLT
14314 /* The displacement value goes in the otherwise-unused
14315 last word of the second entry. */
14316 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 28);
14318 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 16);
14323 /* UnixWare sets the entsize of .plt to 4, although that doesn't
14324 really seem like the right value. */
14325 if (splt
->output_section
->owner
== output_bfd
)
14326 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
14328 if (htab
->dt_tlsdesc_plt
)
14330 bfd_vma got_address
14331 = sgot
->output_section
->vma
+ sgot
->output_offset
;
14332 bfd_vma gotplt_address
= (htab
->root
.sgot
->output_section
->vma
14333 + htab
->root
.sgot
->output_offset
);
14334 bfd_vma plt_address
14335 = splt
->output_section
->vma
+ splt
->output_offset
;
14337 arm_put_trampoline (htab
, output_bfd
,
14338 splt
->contents
+ htab
->dt_tlsdesc_plt
,
14339 dl_tlsdesc_lazy_trampoline
, 6);
14341 bfd_put_32 (output_bfd
,
14342 gotplt_address
+ htab
->dt_tlsdesc_got
14343 - (plt_address
+ htab
->dt_tlsdesc_plt
)
14344 - dl_tlsdesc_lazy_trampoline
[6],
14345 splt
->contents
+ htab
->dt_tlsdesc_plt
+ 24);
14346 bfd_put_32 (output_bfd
,
14347 got_address
- (plt_address
+ htab
->dt_tlsdesc_plt
)
14348 - dl_tlsdesc_lazy_trampoline
[7],
14349 splt
->contents
+ htab
->dt_tlsdesc_plt
+ 24 + 4);
14352 if (htab
->tls_trampoline
)
14354 arm_put_trampoline (htab
, output_bfd
,
14355 splt
->contents
+ htab
->tls_trampoline
,
14356 tls_trampoline
, 3);
14357 #ifdef FOUR_WORD_PLT
14358 bfd_put_32 (output_bfd
, 0x00000000,
14359 splt
->contents
+ htab
->tls_trampoline
+ 12);
14363 if (htab
->vxworks_p
&& !info
->shared
&& htab
->root
.splt
->size
> 0)
14365 /* Correct the .rel(a).plt.unloaded relocations. They will have
14366 incorrect symbol indexes. */
14370 num_plts
= ((htab
->root
.splt
->size
- htab
->plt_header_size
)
14371 / htab
->plt_entry_size
);
14372 p
= htab
->srelplt2
->contents
+ RELOC_SIZE (htab
);
14374 for (; num_plts
; num_plts
--)
14376 Elf_Internal_Rela rel
;
14378 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
14379 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
14380 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
14381 p
+= RELOC_SIZE (htab
);
14383 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
14384 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
14385 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
14386 p
+= RELOC_SIZE (htab
);
14391 /* Fill in the first three entries in the global offset table. */
14394 if (sgot
->size
> 0)
14397 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
14399 bfd_put_32 (output_bfd
,
14400 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
14402 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
14403 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
14406 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
14413 elf32_arm_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
14415 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
14416 struct elf32_arm_link_hash_table
*globals
;
14418 i_ehdrp
= elf_elfheader (abfd
);
14420 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_UNKNOWN
)
14421 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_ARM
;
14423 i_ehdrp
->e_ident
[EI_OSABI
] = 0;
14424 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
14428 globals
= elf32_arm_hash_table (link_info
);
14429 if (globals
!= NULL
&& globals
->byteswap_code
)
14430 i_ehdrp
->e_flags
|= EF_ARM_BE8
;
14433 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_VER5
14434 && ((i_ehdrp
->e_type
== ET_DYN
) || (i_ehdrp
->e_type
== ET_EXEC
)))
14436 int abi
= bfd_elf_get_obj_attr_int (abfd
, OBJ_ATTR_PROC
, Tag_ABI_VFP_args
);
14438 i_ehdrp
->e_flags
|= EF_ARM_ABI_FLOAT_HARD
;
14440 i_ehdrp
->e_flags
|= EF_ARM_ABI_FLOAT_SOFT
;
14444 static enum elf_reloc_type_class
14445 elf32_arm_reloc_type_class (const Elf_Internal_Rela
*rela
)
14447 switch ((int) ELF32_R_TYPE (rela
->r_info
))
14449 case R_ARM_RELATIVE
:
14450 return reloc_class_relative
;
14451 case R_ARM_JUMP_SLOT
:
14452 return reloc_class_plt
;
14454 return reloc_class_copy
;
14456 return reloc_class_normal
;
14461 elf32_arm_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
14463 bfd_arm_update_notes (abfd
, ARM_NOTE_SECTION
);
14466 /* Return TRUE if this is an unwinding table entry. */
14469 is_arm_elf_unwind_section_name (bfd
* abfd ATTRIBUTE_UNUSED
, const char * name
)
14471 return (CONST_STRNEQ (name
, ELF_STRING_ARM_unwind
)
14472 || CONST_STRNEQ (name
, ELF_STRING_ARM_unwind_once
));
14476 /* Set the type and flags for an ARM section. We do this by
14477 the section name, which is a hack, but ought to work. */
14480 elf32_arm_fake_sections (bfd
* abfd
, Elf_Internal_Shdr
* hdr
, asection
* sec
)
14484 name
= bfd_get_section_name (abfd
, sec
);
14486 if (is_arm_elf_unwind_section_name (abfd
, name
))
14488 hdr
->sh_type
= SHT_ARM_EXIDX
;
14489 hdr
->sh_flags
|= SHF_LINK_ORDER
;
14494 /* Handle an ARM specific section when reading an object file. This is
14495 called when bfd_section_from_shdr finds a section with an unknown
14499 elf32_arm_section_from_shdr (bfd
*abfd
,
14500 Elf_Internal_Shdr
* hdr
,
14504 /* There ought to be a place to keep ELF backend specific flags, but
14505 at the moment there isn't one. We just keep track of the
14506 sections by their name, instead. Fortunately, the ABI gives
14507 names for all the ARM specific sections, so we will probably get
14509 switch (hdr
->sh_type
)
14511 case SHT_ARM_EXIDX
:
14512 case SHT_ARM_PREEMPTMAP
:
14513 case SHT_ARM_ATTRIBUTES
:
14520 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
14526 static _arm_elf_section_data
*
14527 get_arm_elf_section_data (asection
* sec
)
14529 if (sec
&& sec
->owner
&& is_arm_elf (sec
->owner
))
14530 return elf32_arm_section_data (sec
);
14538 struct bfd_link_info
*info
;
14541 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
14542 asection
*, struct elf_link_hash_entry
*);
14543 } output_arch_syminfo
;
14545 enum map_symbol_type
14553 /* Output a single mapping symbol. */
14556 elf32_arm_output_map_sym (output_arch_syminfo
*osi
,
14557 enum map_symbol_type type
,
14560 static const char *names
[3] = {"$a", "$t", "$d"};
14561 Elf_Internal_Sym sym
;
14563 sym
.st_value
= osi
->sec
->output_section
->vma
14564 + osi
->sec
->output_offset
14568 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
14569 sym
.st_shndx
= osi
->sec_shndx
;
14570 sym
.st_target_internal
= 0;
14571 elf32_arm_section_map_add (osi
->sec
, names
[type
][1], offset
);
14572 return osi
->func (osi
->flaginfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
14575 /* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT.
14576 IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */
14579 elf32_arm_output_plt_map_1 (output_arch_syminfo
*osi
,
14580 bfd_boolean is_iplt_entry_p
,
14581 union gotplt_union
*root_plt
,
14582 struct arm_plt_info
*arm_plt
)
14584 struct elf32_arm_link_hash_table
*htab
;
14585 bfd_vma addr
, plt_header_size
;
14587 if (root_plt
->offset
== (bfd_vma
) -1)
14590 htab
= elf32_arm_hash_table (osi
->info
);
14594 if (is_iplt_entry_p
)
14596 osi
->sec
= htab
->root
.iplt
;
14597 plt_header_size
= 0;
14601 osi
->sec
= htab
->root
.splt
;
14602 plt_header_size
= htab
->plt_header_size
;
14604 osi
->sec_shndx
= (_bfd_elf_section_from_bfd_section
14605 (osi
->info
->output_bfd
, osi
->sec
->output_section
));
14607 addr
= root_plt
->offset
& -2;
14608 if (htab
->symbian_p
)
14610 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14612 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 4))
14615 else if (htab
->vxworks_p
)
14617 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14619 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 8))
14621 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
+ 12))
14623 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 20))
14626 else if (htab
->nacl_p
)
14628 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14633 bfd_boolean thumb_stub_p
;
14635 thumb_stub_p
= elf32_arm_plt_needs_thumb_stub_p (osi
->info
, arm_plt
);
14638 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_THUMB
, addr
- 4))
14641 #ifdef FOUR_WORD_PLT
14642 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14644 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 12))
14647 /* A three-word PLT with no Thumb thunk contains only Arm code,
14648 so only need to output a mapping symbol for the first PLT entry and
14649 entries with thumb thunks. */
14650 if (thumb_stub_p
|| addr
== plt_header_size
)
14652 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14661 /* Output mapping symbols for PLT entries associated with H. */
14664 elf32_arm_output_plt_map (struct elf_link_hash_entry
*h
, void *inf
)
14666 output_arch_syminfo
*osi
= (output_arch_syminfo
*) inf
;
14667 struct elf32_arm_link_hash_entry
*eh
;
14669 if (h
->root
.type
== bfd_link_hash_indirect
)
14672 if (h
->root
.type
== bfd_link_hash_warning
)
14673 /* When warning symbols are created, they **replace** the "real"
14674 entry in the hash table, thus we never get to see the real
14675 symbol in a hash traversal. So look at it now. */
14676 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
14678 eh
= (struct elf32_arm_link_hash_entry
*) h
;
14679 return elf32_arm_output_plt_map_1 (osi
, SYMBOL_CALLS_LOCAL (osi
->info
, h
),
14680 &h
->plt
, &eh
->plt
);
14683 /* Output a single local symbol for a generated stub. */
14686 elf32_arm_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
14687 bfd_vma offset
, bfd_vma size
)
14689 Elf_Internal_Sym sym
;
14691 sym
.st_value
= osi
->sec
->output_section
->vma
14692 + osi
->sec
->output_offset
14694 sym
.st_size
= size
;
14696 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
14697 sym
.st_shndx
= osi
->sec_shndx
;
14698 sym
.st_target_internal
= 0;
14699 return osi
->func (osi
->flaginfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
14703 arm_map_one_stub (struct bfd_hash_entry
* gen_entry
,
14706 struct elf32_arm_stub_hash_entry
*stub_entry
;
14707 asection
*stub_sec
;
14710 output_arch_syminfo
*osi
;
14711 const insn_sequence
*template_sequence
;
14712 enum stub_insn_type prev_type
;
14715 enum map_symbol_type sym_type
;
14717 /* Massage our args to the form they really have. */
14718 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
14719 osi
= (output_arch_syminfo
*) in_arg
;
14721 stub_sec
= stub_entry
->stub_sec
;
14723 /* Ensure this stub is attached to the current section being
14725 if (stub_sec
!= osi
->sec
)
14728 addr
= (bfd_vma
) stub_entry
->stub_offset
;
14729 stub_name
= stub_entry
->output_name
;
14731 template_sequence
= stub_entry
->stub_template
;
14732 switch (template_sequence
[0].type
)
14735 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
, stub_entry
->stub_size
))
14740 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
| 1,
14741 stub_entry
->stub_size
))
14749 prev_type
= DATA_TYPE
;
14751 for (i
= 0; i
< stub_entry
->stub_template_size
; i
++)
14753 switch (template_sequence
[i
].type
)
14756 sym_type
= ARM_MAP_ARM
;
14761 sym_type
= ARM_MAP_THUMB
;
14765 sym_type
= ARM_MAP_DATA
;
14773 if (template_sequence
[i
].type
!= prev_type
)
14775 prev_type
= template_sequence
[i
].type
;
14776 if (!elf32_arm_output_map_sym (osi
, sym_type
, addr
+ size
))
14780 switch (template_sequence
[i
].type
)
14804 /* Output mapping symbols for linker generated sections,
14805 and for those data-only sections that do not have a
14809 elf32_arm_output_arch_local_syms (bfd
*output_bfd
,
14810 struct bfd_link_info
*info
,
14812 int (*func
) (void *, const char *,
14813 Elf_Internal_Sym
*,
14815 struct elf_link_hash_entry
*))
14817 output_arch_syminfo osi
;
14818 struct elf32_arm_link_hash_table
*htab
;
14820 bfd_size_type size
;
14823 htab
= elf32_arm_hash_table (info
);
14827 check_use_blx (htab
);
14829 osi
.flaginfo
= flaginfo
;
14833 /* Add a $d mapping symbol to data-only sections that
14834 don't have any mapping symbol. This may result in (harmless) redundant
14835 mapping symbols. */
14836 for (input_bfd
= info
->input_bfds
;
14838 input_bfd
= input_bfd
->link_next
)
14840 if ((input_bfd
->flags
& (BFD_LINKER_CREATED
| HAS_SYMS
)) == HAS_SYMS
)
14841 for (osi
.sec
= input_bfd
->sections
;
14843 osi
.sec
= osi
.sec
->next
)
14845 if (osi
.sec
->output_section
!= NULL
14846 && ((osi
.sec
->output_section
->flags
& (SEC_ALLOC
| SEC_CODE
))
14848 && (osi
.sec
->flags
& (SEC_HAS_CONTENTS
| SEC_LINKER_CREATED
))
14849 == SEC_HAS_CONTENTS
14850 && get_arm_elf_section_data (osi
.sec
) != NULL
14851 && get_arm_elf_section_data (osi
.sec
)->mapcount
== 0
14852 && osi
.sec
->size
> 0
14853 && (osi
.sec
->flags
& SEC_EXCLUDE
) == 0)
14855 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14856 (output_bfd
, osi
.sec
->output_section
);
14857 if (osi
.sec_shndx
!= (int)SHN_BAD
)
14858 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 0);
14863 /* ARM->Thumb glue. */
14864 if (htab
->arm_glue_size
> 0)
14866 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
14867 ARM2THUMB_GLUE_SECTION_NAME
);
14869 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14870 (output_bfd
, osi
.sec
->output_section
);
14871 if (info
->shared
|| htab
->root
.is_relocatable_executable
14872 || htab
->pic_veneer
)
14873 size
= ARM2THUMB_PIC_GLUE_SIZE
;
14874 else if (htab
->use_blx
)
14875 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
14877 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
14879 for (offset
= 0; offset
< htab
->arm_glue_size
; offset
+= size
)
14881 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
);
14882 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, offset
+ size
- 4);
14886 /* Thumb->ARM glue. */
14887 if (htab
->thumb_glue_size
> 0)
14889 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
14890 THUMB2ARM_GLUE_SECTION_NAME
);
14892 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14893 (output_bfd
, osi
.sec
->output_section
);
14894 size
= THUMB2ARM_GLUE_SIZE
;
14896 for (offset
= 0; offset
< htab
->thumb_glue_size
; offset
+= size
)
14898 elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, offset
);
14899 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
+ 4);
14903 /* ARMv4 BX veneers. */
14904 if (htab
->bx_glue_size
> 0)
14906 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
14907 ARM_BX_GLUE_SECTION_NAME
);
14909 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14910 (output_bfd
, osi
.sec
->output_section
);
14912 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0);
14915 /* Long calls stubs. */
14916 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
14918 asection
* stub_sec
;
14920 for (stub_sec
= htab
->stub_bfd
->sections
;
14922 stub_sec
= stub_sec
->next
)
14924 /* Ignore non-stub sections. */
14925 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
14928 osi
.sec
= stub_sec
;
14930 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14931 (output_bfd
, osi
.sec
->output_section
);
14933 bfd_hash_traverse (&htab
->stub_hash_table
, arm_map_one_stub
, &osi
);
14937 /* Finally, output mapping symbols for the PLT. */
14938 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
14940 osi
.sec
= htab
->root
.splt
;
14941 osi
.sec_shndx
= (_bfd_elf_section_from_bfd_section
14942 (output_bfd
, osi
.sec
->output_section
));
14944 /* Output mapping symbols for the plt header. SymbianOS does not have a
14946 if (htab
->vxworks_p
)
14948 /* VxWorks shared libraries have no PLT header. */
14951 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
14953 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 12))
14957 else if (htab
->nacl_p
)
14959 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
14962 else if (!htab
->symbian_p
)
14964 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
14966 #ifndef FOUR_WORD_PLT
14967 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 16))
14972 if ((htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
14973 || (htab
->root
.iplt
&& htab
->root
.iplt
->size
> 0))
14975 elf_link_hash_traverse (&htab
->root
, elf32_arm_output_plt_map
, &osi
);
14976 for (input_bfd
= info
->input_bfds
;
14978 input_bfd
= input_bfd
->link_next
)
14980 struct arm_local_iplt_info
**local_iplt
;
14981 unsigned int i
, num_syms
;
14983 local_iplt
= elf32_arm_local_iplt (input_bfd
);
14984 if (local_iplt
!= NULL
)
14986 num_syms
= elf_symtab_hdr (input_bfd
).sh_info
;
14987 for (i
= 0; i
< num_syms
; i
++)
14988 if (local_iplt
[i
] != NULL
14989 && !elf32_arm_output_plt_map_1 (&osi
, TRUE
,
14990 &local_iplt
[i
]->root
,
14991 &local_iplt
[i
]->arm
))
14996 if (htab
->dt_tlsdesc_plt
!= 0)
14998 /* Mapping symbols for the lazy tls trampoline. */
14999 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, htab
->dt_tlsdesc_plt
))
15002 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
,
15003 htab
->dt_tlsdesc_plt
+ 24))
15006 if (htab
->tls_trampoline
!= 0)
15008 /* Mapping symbols for the tls trampoline. */
15009 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, htab
->tls_trampoline
))
15011 #ifdef FOUR_WORD_PLT
15012 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
,
15013 htab
->tls_trampoline
+ 12))
15021 /* Allocate target specific section data. */
15024 elf32_arm_new_section_hook (bfd
*abfd
, asection
*sec
)
15026 if (!sec
->used_by_bfd
)
15028 _arm_elf_section_data
*sdata
;
15029 bfd_size_type amt
= sizeof (*sdata
);
15031 sdata
= (_arm_elf_section_data
*) bfd_zalloc (abfd
, amt
);
15034 sec
->used_by_bfd
= sdata
;
15037 return _bfd_elf_new_section_hook (abfd
, sec
);
15041 /* Used to order a list of mapping symbols by address. */
15044 elf32_arm_compare_mapping (const void * a
, const void * b
)
15046 const elf32_arm_section_map
*amap
= (const elf32_arm_section_map
*) a
;
15047 const elf32_arm_section_map
*bmap
= (const elf32_arm_section_map
*) b
;
15049 if (amap
->vma
> bmap
->vma
)
15051 else if (amap
->vma
< bmap
->vma
)
15053 else if (amap
->type
> bmap
->type
)
15054 /* Ensure results do not depend on the host qsort for objects with
15055 multiple mapping symbols at the same address by sorting on type
15058 else if (amap
->type
< bmap
->type
)
15064 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
15066 static unsigned long
15067 offset_prel31 (unsigned long addr
, bfd_vma offset
)
15069 return (addr
& ~0x7ffffffful
) | ((addr
+ offset
) & 0x7ffffffful
);
15072 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
15076 copy_exidx_entry (bfd
*output_bfd
, bfd_byte
*to
, bfd_byte
*from
, bfd_vma offset
)
15078 unsigned long first_word
= bfd_get_32 (output_bfd
, from
);
15079 unsigned long second_word
= bfd_get_32 (output_bfd
, from
+ 4);
15081 /* High bit of first word is supposed to be zero. */
15082 if ((first_word
& 0x80000000ul
) == 0)
15083 first_word
= offset_prel31 (first_word
, offset
);
15085 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
15086 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
15087 if ((second_word
!= 0x1) && ((second_word
& 0x80000000ul
) == 0))
15088 second_word
= offset_prel31 (second_word
, offset
);
15090 bfd_put_32 (output_bfd
, first_word
, to
);
15091 bfd_put_32 (output_bfd
, second_word
, to
+ 4);
15094 /* Data for make_branch_to_a8_stub(). */
15096 struct a8_branch_to_stub_data
15098 asection
*writing_section
;
15099 bfd_byte
*contents
;
15103 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
15104 places for a particular section. */
15107 make_branch_to_a8_stub (struct bfd_hash_entry
*gen_entry
,
15110 struct elf32_arm_stub_hash_entry
*stub_entry
;
15111 struct a8_branch_to_stub_data
*data
;
15112 bfd_byte
*contents
;
15113 unsigned long branch_insn
;
15114 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
15115 bfd_signed_vma branch_offset
;
15117 unsigned int target
;
15119 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
15120 data
= (struct a8_branch_to_stub_data
*) in_arg
;
15122 if (stub_entry
->target_section
!= data
->writing_section
15123 || stub_entry
->stub_type
< arm_stub_a8_veneer_lwm
)
15126 contents
= data
->contents
;
15128 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
15129 + stub_entry
->target_section
->output_offset
15130 + stub_entry
->target_value
;
15132 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
15133 + stub_entry
->stub_sec
->output_offset
15134 + stub_entry
->stub_offset
;
15136 if (stub_entry
->stub_type
== arm_stub_a8_veneer_blx
)
15137 veneered_insn_loc
&= ~3u;
15139 branch_offset
= veneer_entry_loc
- veneered_insn_loc
- 4;
15141 abfd
= stub_entry
->target_section
->owner
;
15142 target
= stub_entry
->target_value
;
15144 /* We attempt to avoid this condition by setting stubs_always_after_branch
15145 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
15146 This check is just to be on the safe side... */
15147 if ((veneered_insn_loc
& ~0xfff) == (veneer_entry_loc
& ~0xfff))
15149 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub is "
15150 "allocated in unsafe location"), abfd
);
15154 switch (stub_entry
->stub_type
)
15156 case arm_stub_a8_veneer_b
:
15157 case arm_stub_a8_veneer_b_cond
:
15158 branch_insn
= 0xf0009000;
15161 case arm_stub_a8_veneer_blx
:
15162 branch_insn
= 0xf000e800;
15165 case arm_stub_a8_veneer_bl
:
15167 unsigned int i1
, j1
, i2
, j2
, s
;
15169 branch_insn
= 0xf000d000;
15172 if (branch_offset
< -16777216 || branch_offset
> 16777214)
15174 /* There's not much we can do apart from complain if this
15176 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub out "
15177 "of range (input file too large)"), abfd
);
15181 /* i1 = not(j1 eor s), so:
15183 j1 = (not i1) eor s. */
15185 branch_insn
|= (branch_offset
>> 1) & 0x7ff;
15186 branch_insn
|= ((branch_offset
>> 12) & 0x3ff) << 16;
15187 i2
= (branch_offset
>> 22) & 1;
15188 i1
= (branch_offset
>> 23) & 1;
15189 s
= (branch_offset
>> 24) & 1;
15192 branch_insn
|= j2
<< 11;
15193 branch_insn
|= j1
<< 13;
15194 branch_insn
|= s
<< 26;
15203 bfd_put_16 (abfd
, (branch_insn
>> 16) & 0xffff, &contents
[target
]);
15204 bfd_put_16 (abfd
, branch_insn
& 0xffff, &contents
[target
+ 2]);
15209 /* Do code byteswapping. Return FALSE afterwards so that the section is
15210 written out as normal. */
15213 elf32_arm_write_section (bfd
*output_bfd
,
15214 struct bfd_link_info
*link_info
,
15216 bfd_byte
*contents
)
15218 unsigned int mapcount
, errcount
;
15219 _arm_elf_section_data
*arm_data
;
15220 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
15221 elf32_arm_section_map
*map
;
15222 elf32_vfp11_erratum_list
*errnode
;
15225 bfd_vma offset
= sec
->output_section
->vma
+ sec
->output_offset
;
15229 if (globals
== NULL
)
15232 /* If this section has not been allocated an _arm_elf_section_data
15233 structure then we cannot record anything. */
15234 arm_data
= get_arm_elf_section_data (sec
);
15235 if (arm_data
== NULL
)
15238 mapcount
= arm_data
->mapcount
;
15239 map
= arm_data
->map
;
15240 errcount
= arm_data
->erratumcount
;
15244 unsigned int endianflip
= bfd_big_endian (output_bfd
) ? 3 : 0;
15246 for (errnode
= arm_data
->erratumlist
; errnode
!= 0;
15247 errnode
= errnode
->next
)
15249 bfd_vma target
= errnode
->vma
- offset
;
15251 switch (errnode
->type
)
15253 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
15255 bfd_vma branch_to_veneer
;
15256 /* Original condition code of instruction, plus bit mask for
15257 ARM B instruction. */
15258 unsigned int insn
= (errnode
->u
.b
.vfp_insn
& 0xf0000000)
15261 /* The instruction is before the label. */
15264 /* Above offset included in -4 below. */
15265 branch_to_veneer
= errnode
->u
.b
.veneer
->vma
15266 - errnode
->vma
- 4;
15268 if ((signed) branch_to_veneer
< -(1 << 25)
15269 || (signed) branch_to_veneer
>= (1 << 25))
15270 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
15271 "range"), output_bfd
);
15273 insn
|= (branch_to_veneer
>> 2) & 0xffffff;
15274 contents
[endianflip
^ target
] = insn
& 0xff;
15275 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
15276 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
15277 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
15281 case VFP11_ERRATUM_ARM_VENEER
:
15283 bfd_vma branch_from_veneer
;
15286 /* Take size of veneer into account. */
15287 branch_from_veneer
= errnode
->u
.v
.branch
->vma
15288 - errnode
->vma
- 12;
15290 if ((signed) branch_from_veneer
< -(1 << 25)
15291 || (signed) branch_from_veneer
>= (1 << 25))
15292 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
15293 "range"), output_bfd
);
15295 /* Original instruction. */
15296 insn
= errnode
->u
.v
.branch
->u
.b
.vfp_insn
;
15297 contents
[endianflip
^ target
] = insn
& 0xff;
15298 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
15299 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
15300 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
15302 /* Branch back to insn after original insn. */
15303 insn
= 0xea000000 | ((branch_from_veneer
>> 2) & 0xffffff);
15304 contents
[endianflip
^ (target
+ 4)] = insn
& 0xff;
15305 contents
[endianflip
^ (target
+ 5)] = (insn
>> 8) & 0xff;
15306 contents
[endianflip
^ (target
+ 6)] = (insn
>> 16) & 0xff;
15307 contents
[endianflip
^ (target
+ 7)] = (insn
>> 24) & 0xff;
15317 if (arm_data
->elf
.this_hdr
.sh_type
== SHT_ARM_EXIDX
)
15319 arm_unwind_table_edit
*edit_node
15320 = arm_data
->u
.exidx
.unwind_edit_list
;
15321 /* Now, sec->size is the size of the section we will write. The original
15322 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
15323 markers) was sec->rawsize. (This isn't the case if we perform no
15324 edits, then rawsize will be zero and we should use size). */
15325 bfd_byte
*edited_contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
15326 unsigned int input_size
= sec
->rawsize
? sec
->rawsize
: sec
->size
;
15327 unsigned int in_index
, out_index
;
15328 bfd_vma add_to_offsets
= 0;
15330 for (in_index
= 0, out_index
= 0; in_index
* 8 < input_size
|| edit_node
;)
15334 unsigned int edit_index
= edit_node
->index
;
15336 if (in_index
< edit_index
&& in_index
* 8 < input_size
)
15338 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
15339 contents
+ in_index
* 8, add_to_offsets
);
15343 else if (in_index
== edit_index
15344 || (in_index
* 8 >= input_size
15345 && edit_index
== UINT_MAX
))
15347 switch (edit_node
->type
)
15349 case DELETE_EXIDX_ENTRY
:
15351 add_to_offsets
+= 8;
15354 case INSERT_EXIDX_CANTUNWIND_AT_END
:
15356 asection
*text_sec
= edit_node
->linked_section
;
15357 bfd_vma text_offset
= text_sec
->output_section
->vma
15358 + text_sec
->output_offset
15360 bfd_vma exidx_offset
= offset
+ out_index
* 8;
15361 unsigned long prel31_offset
;
15363 /* Note: this is meant to be equivalent to an
15364 R_ARM_PREL31 relocation. These synthetic
15365 EXIDX_CANTUNWIND markers are not relocated by the
15366 usual BFD method. */
15367 prel31_offset
= (text_offset
- exidx_offset
)
15370 /* First address we can't unwind. */
15371 bfd_put_32 (output_bfd
, prel31_offset
,
15372 &edited_contents
[out_index
* 8]);
15374 /* Code for EXIDX_CANTUNWIND. */
15375 bfd_put_32 (output_bfd
, 0x1,
15376 &edited_contents
[out_index
* 8 + 4]);
15379 add_to_offsets
-= 8;
15384 edit_node
= edit_node
->next
;
15389 /* No more edits, copy remaining entries verbatim. */
15390 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
15391 contents
+ in_index
* 8, add_to_offsets
);
15397 if (!(sec
->flags
& SEC_EXCLUDE
) && !(sec
->flags
& SEC_NEVER_LOAD
))
15398 bfd_set_section_contents (output_bfd
, sec
->output_section
,
15400 (file_ptr
) sec
->output_offset
, sec
->size
);
15405 /* Fix code to point to Cortex-A8 erratum stubs. */
15406 if (globals
->fix_cortex_a8
)
15408 struct a8_branch_to_stub_data data
;
15410 data
.writing_section
= sec
;
15411 data
.contents
= contents
;
15413 bfd_hash_traverse (&globals
->stub_hash_table
, make_branch_to_a8_stub
,
15420 if (globals
->byteswap_code
)
15422 qsort (map
, mapcount
, sizeof (* map
), elf32_arm_compare_mapping
);
15425 for (i
= 0; i
< mapcount
; i
++)
15427 if (i
== mapcount
- 1)
15430 end
= map
[i
+ 1].vma
;
15432 switch (map
[i
].type
)
15435 /* Byte swap code words. */
15436 while (ptr
+ 3 < end
)
15438 tmp
= contents
[ptr
];
15439 contents
[ptr
] = contents
[ptr
+ 3];
15440 contents
[ptr
+ 3] = tmp
;
15441 tmp
= contents
[ptr
+ 1];
15442 contents
[ptr
+ 1] = contents
[ptr
+ 2];
15443 contents
[ptr
+ 2] = tmp
;
15449 /* Byte swap code halfwords. */
15450 while (ptr
+ 1 < end
)
15452 tmp
= contents
[ptr
];
15453 contents
[ptr
] = contents
[ptr
+ 1];
15454 contents
[ptr
+ 1] = tmp
;
15460 /* Leave data alone. */
15468 arm_data
->mapcount
= -1;
15469 arm_data
->mapsize
= 0;
15470 arm_data
->map
= NULL
;
15475 /* Mangle thumb function symbols as we read them in. */
15478 elf32_arm_swap_symbol_in (bfd
* abfd
,
15481 Elf_Internal_Sym
*dst
)
15483 if (!bfd_elf32_swap_symbol_in (abfd
, psrc
, pshn
, dst
))
15486 /* New EABI objects mark thumb function symbols by setting the low bit of
15488 if (ELF_ST_TYPE (dst
->st_info
) == STT_FUNC
15489 || ELF_ST_TYPE (dst
->st_info
) == STT_GNU_IFUNC
)
15491 if (dst
->st_value
& 1)
15493 dst
->st_value
&= ~(bfd_vma
) 1;
15494 dst
->st_target_internal
= ST_BRANCH_TO_THUMB
;
15497 dst
->st_target_internal
= ST_BRANCH_TO_ARM
;
15499 else if (ELF_ST_TYPE (dst
->st_info
) == STT_ARM_TFUNC
)
15501 dst
->st_info
= ELF_ST_INFO (ELF_ST_BIND (dst
->st_info
), STT_FUNC
);
15502 dst
->st_target_internal
= ST_BRANCH_TO_THUMB
;
15504 else if (ELF_ST_TYPE (dst
->st_info
) == STT_SECTION
)
15505 dst
->st_target_internal
= ST_BRANCH_LONG
;
15507 dst
->st_target_internal
= ST_BRANCH_UNKNOWN
;
15513 /* Mangle thumb function symbols as we write them out. */
15516 elf32_arm_swap_symbol_out (bfd
*abfd
,
15517 const Elf_Internal_Sym
*src
,
15521 Elf_Internal_Sym newsym
;
15523 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
15524 of the address set, as per the new EABI. We do this unconditionally
15525 because objcopy does not set the elf header flags until after
15526 it writes out the symbol table. */
15527 if (src
->st_target_internal
== ST_BRANCH_TO_THUMB
)
15530 if (ELF_ST_TYPE (src
->st_info
) != STT_GNU_IFUNC
)
15531 newsym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (src
->st_info
), STT_FUNC
);
15532 if (newsym
.st_shndx
!= SHN_UNDEF
)
15534 /* Do this only for defined symbols. At link type, the static
15535 linker will simulate the work of dynamic linker of resolving
15536 symbols and will carry over the thumbness of found symbols to
15537 the output symbol table. It's not clear how it happens, but
15538 the thumbness of undefined symbols can well be different at
15539 runtime, and writing '1' for them will be confusing for users
15540 and possibly for dynamic linker itself.
15542 newsym
.st_value
|= 1;
15547 bfd_elf32_swap_symbol_out (abfd
, src
, cdst
, shndx
);
15550 /* Add the PT_ARM_EXIDX program header. */
15553 elf32_arm_modify_segment_map (bfd
*abfd
,
15554 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
15556 struct elf_segment_map
*m
;
15559 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
15560 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
15562 /* If there is already a PT_ARM_EXIDX header, then we do not
15563 want to add another one. This situation arises when running
15564 "strip"; the input binary already has the header. */
15565 m
= elf_tdata (abfd
)->segment_map
;
15566 while (m
&& m
->p_type
!= PT_ARM_EXIDX
)
15570 m
= (struct elf_segment_map
*)
15571 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
15574 m
->p_type
= PT_ARM_EXIDX
;
15576 m
->sections
[0] = sec
;
15578 m
->next
= elf_tdata (abfd
)->segment_map
;
15579 elf_tdata (abfd
)->segment_map
= m
;
15586 /* We may add a PT_ARM_EXIDX program header. */
15589 elf32_arm_additional_program_headers (bfd
*abfd
,
15590 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
15594 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
15595 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
15601 /* Hook called by the linker routine which adds symbols from an object
15605 elf32_arm_add_symbol_hook (bfd
*abfd
, struct bfd_link_info
*info
,
15606 Elf_Internal_Sym
*sym
, const char **namep
,
15607 flagword
*flagsp
, asection
**secp
, bfd_vma
*valp
)
15609 if ((abfd
->flags
& DYNAMIC
) == 0
15610 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
15611 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
15612 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
15614 if (elf32_arm_hash_table (info
)->vxworks_p
15615 && !elf_vxworks_add_symbol_hook (abfd
, info
, sym
, namep
,
15616 flagsp
, secp
, valp
))
15622 /* We use this to override swap_symbol_in and swap_symbol_out. */
15623 const struct elf_size_info elf32_arm_size_info
=
15625 sizeof (Elf32_External_Ehdr
),
15626 sizeof (Elf32_External_Phdr
),
15627 sizeof (Elf32_External_Shdr
),
15628 sizeof (Elf32_External_Rel
),
15629 sizeof (Elf32_External_Rela
),
15630 sizeof (Elf32_External_Sym
),
15631 sizeof (Elf32_External_Dyn
),
15632 sizeof (Elf_External_Note
),
15636 ELFCLASS32
, EV_CURRENT
,
15637 bfd_elf32_write_out_phdrs
,
15638 bfd_elf32_write_shdrs_and_ehdr
,
15639 bfd_elf32_checksum_contents
,
15640 bfd_elf32_write_relocs
,
15641 elf32_arm_swap_symbol_in
,
15642 elf32_arm_swap_symbol_out
,
15643 bfd_elf32_slurp_reloc_table
,
15644 bfd_elf32_slurp_symbol_table
,
15645 bfd_elf32_swap_dyn_in
,
15646 bfd_elf32_swap_dyn_out
,
15647 bfd_elf32_swap_reloc_in
,
15648 bfd_elf32_swap_reloc_out
,
15649 bfd_elf32_swap_reloca_in
,
15650 bfd_elf32_swap_reloca_out
15653 #define ELF_ARCH bfd_arch_arm
15654 #define ELF_TARGET_ID ARM_ELF_DATA
15655 #define ELF_MACHINE_CODE EM_ARM
15656 #ifdef __QNXTARGET__
15657 #define ELF_MAXPAGESIZE 0x1000
15659 #define ELF_MAXPAGESIZE 0x8000
15661 #define ELF_MINPAGESIZE 0x1000
15662 #define ELF_COMMONPAGESIZE 0x1000
15664 #define bfd_elf32_mkobject elf32_arm_mkobject
15666 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
15667 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
15668 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
15669 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
15670 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
15671 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
15672 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
15673 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
15674 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
15675 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
15676 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
15677 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
15678 #define bfd_elf32_bfd_final_link elf32_arm_final_link
15680 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
15681 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
15682 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
15683 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
15684 #define elf_backend_check_relocs elf32_arm_check_relocs
15685 #define elf_backend_relocate_section elf32_arm_relocate_section
15686 #define elf_backend_write_section elf32_arm_write_section
15687 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
15688 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
15689 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
15690 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
15691 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
15692 #define elf_backend_always_size_sections elf32_arm_always_size_sections
15693 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
15694 #define elf_backend_post_process_headers elf32_arm_post_process_headers
15695 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
15696 #define elf_backend_object_p elf32_arm_object_p
15697 #define elf_backend_fake_sections elf32_arm_fake_sections
15698 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
15699 #define elf_backend_final_write_processing elf32_arm_final_write_processing
15700 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
15701 #define elf_backend_size_info elf32_arm_size_info
15702 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
15703 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
15704 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
15705 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
15706 #define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
15708 #define elf_backend_can_refcount 1
15709 #define elf_backend_can_gc_sections 1
15710 #define elf_backend_plt_readonly 1
15711 #define elf_backend_want_got_plt 1
15712 #define elf_backend_want_plt_sym 0
15713 #define elf_backend_may_use_rel_p 1
15714 #define elf_backend_may_use_rela_p 0
15715 #define elf_backend_default_use_rela_p 0
15717 #define elf_backend_got_header_size 12
15719 #undef elf_backend_obj_attrs_vendor
15720 #define elf_backend_obj_attrs_vendor "aeabi"
15721 #undef elf_backend_obj_attrs_section
15722 #define elf_backend_obj_attrs_section ".ARM.attributes"
15723 #undef elf_backend_obj_attrs_arg_type
15724 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
15725 #undef elf_backend_obj_attrs_section_type
15726 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
15727 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
15728 #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
15730 #include "elf32-target.h"
15732 /* Native Client targets. */
15734 #undef TARGET_LITTLE_SYM
15735 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_nacl_vec
15736 #undef TARGET_LITTLE_NAME
15737 #define TARGET_LITTLE_NAME "elf32-littlearm-nacl"
15738 #undef TARGET_BIG_SYM
15739 #define TARGET_BIG_SYM bfd_elf32_bigarm_nacl_vec
15740 #undef TARGET_BIG_NAME
15741 #define TARGET_BIG_NAME "elf32-bigarm-nacl"
15743 /* Like elf32_arm_link_hash_table_create -- but overrides
15744 appropriately for NaCl. */
15746 static struct bfd_link_hash_table
*
15747 elf32_arm_nacl_link_hash_table_create (bfd
*abfd
)
15749 struct bfd_link_hash_table
*ret
;
15751 ret
= elf32_arm_link_hash_table_create (abfd
);
15754 struct elf32_arm_link_hash_table
*htab
15755 = (struct elf32_arm_link_hash_table
*) ret
;
15759 htab
->plt_header_size
= 4 * ARRAY_SIZE (elf32_arm_nacl_plt0_entry
);
15760 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_nacl_plt_entry
);
15765 /* Since NaCl doesn't use the ARM-specific unwind format, we don't
15766 really need to use elf32_arm_modify_segment_map. But we do it
15767 anyway just to reduce gratuitous differences with the stock ARM backend. */
15770 elf32_arm_nacl_modify_segment_map (bfd
*abfd
, struct bfd_link_info
*info
)
15772 return (elf32_arm_modify_segment_map (abfd
, info
)
15773 && nacl_modify_segment_map (abfd
, info
));
15777 #define elf32_bed elf32_arm_nacl_bed
15778 #undef bfd_elf32_bfd_link_hash_table_create
15779 #define bfd_elf32_bfd_link_hash_table_create \
15780 elf32_arm_nacl_link_hash_table_create
15781 #undef elf_backend_plt_alignment
15782 #define elf_backend_plt_alignment 4
15783 #undef elf_backend_modify_segment_map
15784 #define elf_backend_modify_segment_map elf32_arm_nacl_modify_segment_map
15785 #undef elf_backend_modify_program_headers
15786 #define elf_backend_modify_program_headers nacl_modify_program_headers
15788 #undef ELF_MAXPAGESIZE
15789 #define ELF_MAXPAGESIZE 0x10000
15791 #include "elf32-target.h"
15793 /* Reset to defaults. */
15794 #undef elf_backend_plt_alignment
15795 #undef elf_backend_modify_segment_map
15796 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
15797 #undef elf_backend_modify_program_headers
15799 /* VxWorks Targets. */
15801 #undef TARGET_LITTLE_SYM
15802 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
15803 #undef TARGET_LITTLE_NAME
15804 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
15805 #undef TARGET_BIG_SYM
15806 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
15807 #undef TARGET_BIG_NAME
15808 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
15810 /* Like elf32_arm_link_hash_table_create -- but overrides
15811 appropriately for VxWorks. */
15813 static struct bfd_link_hash_table
*
15814 elf32_arm_vxworks_link_hash_table_create (bfd
*abfd
)
15816 struct bfd_link_hash_table
*ret
;
15818 ret
= elf32_arm_link_hash_table_create (abfd
);
15821 struct elf32_arm_link_hash_table
*htab
15822 = (struct elf32_arm_link_hash_table
*) ret
;
15824 htab
->vxworks_p
= 1;
15830 elf32_arm_vxworks_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
15832 elf32_arm_final_write_processing (abfd
, linker
);
15833 elf_vxworks_final_write_processing (abfd
, linker
);
15837 #define elf32_bed elf32_arm_vxworks_bed
15839 #undef bfd_elf32_bfd_link_hash_table_create
15840 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
15841 #undef elf_backend_final_write_processing
15842 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
15843 #undef elf_backend_emit_relocs
15844 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
15846 #undef elf_backend_may_use_rel_p
15847 #define elf_backend_may_use_rel_p 0
15848 #undef elf_backend_may_use_rela_p
15849 #define elf_backend_may_use_rela_p 1
15850 #undef elf_backend_default_use_rela_p
15851 #define elf_backend_default_use_rela_p 1
15852 #undef elf_backend_want_plt_sym
15853 #define elf_backend_want_plt_sym 1
15854 #undef ELF_MAXPAGESIZE
15855 #define ELF_MAXPAGESIZE 0x1000
15857 #include "elf32-target.h"
15860 /* Merge backend specific data from an object file to the output
15861 object file when linking. */
15864 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
)
15866 flagword out_flags
;
15868 bfd_boolean flags_compatible
= TRUE
;
15871 /* Check if we have the same endianness. */
15872 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
15875 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
15878 if (!elf32_arm_merge_eabi_attributes (ibfd
, obfd
))
15881 /* The input BFD must have had its flags initialised. */
15882 /* The following seems bogus to me -- The flags are initialized in
15883 the assembler but I don't think an elf_flags_init field is
15884 written into the object. */
15885 /* BFD_ASSERT (elf_flags_init (ibfd)); */
15887 in_flags
= elf_elfheader (ibfd
)->e_flags
;
15888 out_flags
= elf_elfheader (obfd
)->e_flags
;
15890 /* In theory there is no reason why we couldn't handle this. However
15891 in practice it isn't even close to working and there is no real
15892 reason to want it. */
15893 if (EF_ARM_EABI_VERSION (in_flags
) >= EF_ARM_EABI_VER4
15894 && !(ibfd
->flags
& DYNAMIC
)
15895 && (in_flags
& EF_ARM_BE8
))
15897 _bfd_error_handler (_("error: %B is already in final BE8 format"),
15902 if (!elf_flags_init (obfd
))
15904 /* If the input is the default architecture and had the default
15905 flags then do not bother setting the flags for the output
15906 architecture, instead allow future merges to do this. If no
15907 future merges ever set these flags then they will retain their
15908 uninitialised values, which surprise surprise, correspond
15909 to the default values. */
15910 if (bfd_get_arch_info (ibfd
)->the_default
15911 && elf_elfheader (ibfd
)->e_flags
== 0)
15914 elf_flags_init (obfd
) = TRUE
;
15915 elf_elfheader (obfd
)->e_flags
= in_flags
;
15917 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
15918 && bfd_get_arch_info (obfd
)->the_default
)
15919 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
15924 /* Determine what should happen if the input ARM architecture
15925 does not match the output ARM architecture. */
15926 if (! bfd_arm_merge_machines (ibfd
, obfd
))
15929 /* Identical flags must be compatible. */
15930 if (in_flags
== out_flags
)
15933 /* Check to see if the input BFD actually contains any sections. If
15934 not, its flags may not have been initialised either, but it
15935 cannot actually cause any incompatiblity. Do not short-circuit
15936 dynamic objects; their section list may be emptied by
15937 elf_link_add_object_symbols.
15939 Also check to see if there are no code sections in the input.
15940 In this case there is no need to check for code specific flags.
15941 XXX - do we need to worry about floating-point format compatability
15942 in data sections ? */
15943 if (!(ibfd
->flags
& DYNAMIC
))
15945 bfd_boolean null_input_bfd
= TRUE
;
15946 bfd_boolean only_data_sections
= TRUE
;
15948 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
15950 /* Ignore synthetic glue sections. */
15951 if (strcmp (sec
->name
, ".glue_7")
15952 && strcmp (sec
->name
, ".glue_7t"))
15954 if ((bfd_get_section_flags (ibfd
, sec
)
15955 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
15956 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
15957 only_data_sections
= FALSE
;
15959 null_input_bfd
= FALSE
;
15964 if (null_input_bfd
|| only_data_sections
)
15968 /* Complain about various flag mismatches. */
15969 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags
),
15970 EF_ARM_EABI_VERSION (out_flags
)))
15973 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
15975 (in_flags
& EF_ARM_EABIMASK
) >> 24,
15976 (out_flags
& EF_ARM_EABIMASK
) >> 24);
15980 /* Not sure what needs to be checked for EABI versions >= 1. */
15981 /* VxWorks libraries do not use these flags. */
15982 if (get_elf_backend_data (obfd
) != &elf32_arm_vxworks_bed
15983 && get_elf_backend_data (ibfd
) != &elf32_arm_vxworks_bed
15984 && EF_ARM_EABI_VERSION (in_flags
) == EF_ARM_EABI_UNKNOWN
)
15986 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
15989 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
15991 in_flags
& EF_ARM_APCS_26
? 26 : 32,
15992 out_flags
& EF_ARM_APCS_26
? 26 : 32);
15993 flags_compatible
= FALSE
;
15996 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
15998 if (in_flags
& EF_ARM_APCS_FLOAT
)
16000 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
16004 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
16007 flags_compatible
= FALSE
;
16010 if ((in_flags
& EF_ARM_VFP_FLOAT
) != (out_flags
& EF_ARM_VFP_FLOAT
))
16012 if (in_flags
& EF_ARM_VFP_FLOAT
)
16014 (_("error: %B uses VFP instructions, whereas %B does not"),
16018 (_("error: %B uses FPA instructions, whereas %B does not"),
16021 flags_compatible
= FALSE
;
16024 if ((in_flags
& EF_ARM_MAVERICK_FLOAT
) != (out_flags
& EF_ARM_MAVERICK_FLOAT
))
16026 if (in_flags
& EF_ARM_MAVERICK_FLOAT
)
16028 (_("error: %B uses Maverick instructions, whereas %B does not"),
16032 (_("error: %B does not use Maverick instructions, whereas %B does"),
16035 flags_compatible
= FALSE
;
16038 #ifdef EF_ARM_SOFT_FLOAT
16039 if ((in_flags
& EF_ARM_SOFT_FLOAT
) != (out_flags
& EF_ARM_SOFT_FLOAT
))
16041 /* We can allow interworking between code that is VFP format
16042 layout, and uses either soft float or integer regs for
16043 passing floating point arguments and results. We already
16044 know that the APCS_FLOAT flags match; similarly for VFP
16046 if ((in_flags
& EF_ARM_APCS_FLOAT
) != 0
16047 || (in_flags
& EF_ARM_VFP_FLOAT
) == 0)
16049 if (in_flags
& EF_ARM_SOFT_FLOAT
)
16051 (_("error: %B uses software FP, whereas %B uses hardware FP"),
16055 (_("error: %B uses hardware FP, whereas %B uses software FP"),
16058 flags_compatible
= FALSE
;
16063 /* Interworking mismatch is only a warning. */
16064 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
16066 if (in_flags
& EF_ARM_INTERWORK
)
16069 (_("Warning: %B supports interworking, whereas %B does not"),
16075 (_("Warning: %B does not support interworking, whereas %B does"),
16081 return flags_compatible
;
16085 /* Symbian OS Targets. */
16087 #undef TARGET_LITTLE_SYM
16088 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
16089 #undef TARGET_LITTLE_NAME
16090 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
16091 #undef TARGET_BIG_SYM
16092 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
16093 #undef TARGET_BIG_NAME
16094 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
16096 /* Like elf32_arm_link_hash_table_create -- but overrides
16097 appropriately for Symbian OS. */
16099 static struct bfd_link_hash_table
*
16100 elf32_arm_symbian_link_hash_table_create (bfd
*abfd
)
16102 struct bfd_link_hash_table
*ret
;
16104 ret
= elf32_arm_link_hash_table_create (abfd
);
16107 struct elf32_arm_link_hash_table
*htab
16108 = (struct elf32_arm_link_hash_table
*)ret
;
16109 /* There is no PLT header for Symbian OS. */
16110 htab
->plt_header_size
= 0;
16111 /* The PLT entries are each one instruction and one word. */
16112 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
);
16113 htab
->symbian_p
= 1;
16114 /* Symbian uses armv5t or above, so use_blx is always true. */
16116 htab
->root
.is_relocatable_executable
= 1;
16121 static const struct bfd_elf_special_section
16122 elf32_arm_symbian_special_sections
[] =
16124 /* In a BPABI executable, the dynamic linking sections do not go in
16125 the loadable read-only segment. The post-linker may wish to
16126 refer to these sections, but they are not part of the final
16128 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC
, 0 },
16129 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB
, 0 },
16130 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM
, 0 },
16131 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS
, 0 },
16132 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH
, 0 },
16133 /* These sections do not need to be writable as the SymbianOS
16134 postlinker will arrange things so that no dynamic relocation is
16136 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY
, SHF_ALLOC
},
16137 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY
, SHF_ALLOC
},
16138 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
},
16139 { NULL
, 0, 0, 0, 0 }
16143 elf32_arm_symbian_begin_write_processing (bfd
*abfd
,
16144 struct bfd_link_info
*link_info
)
16146 /* BPABI objects are never loaded directly by an OS kernel; they are
16147 processed by a postlinker first, into an OS-specific format. If
16148 the D_PAGED bit is set on the file, BFD will align segments on
16149 page boundaries, so that an OS can directly map the file. With
16150 BPABI objects, that just results in wasted space. In addition,
16151 because we clear the D_PAGED bit, map_sections_to_segments will
16152 recognize that the program headers should not be mapped into any
16153 loadable segment. */
16154 abfd
->flags
&= ~D_PAGED
;
16155 elf32_arm_begin_write_processing (abfd
, link_info
);
16159 elf32_arm_symbian_modify_segment_map (bfd
*abfd
,
16160 struct bfd_link_info
*info
)
16162 struct elf_segment_map
*m
;
16165 /* BPABI shared libraries and executables should have a PT_DYNAMIC
16166 segment. However, because the .dynamic section is not marked
16167 with SEC_LOAD, the generic ELF code will not create such a
16169 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
16172 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
16173 if (m
->p_type
== PT_DYNAMIC
)
16178 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
16179 m
->next
= elf_tdata (abfd
)->segment_map
;
16180 elf_tdata (abfd
)->segment_map
= m
;
16184 /* Also call the generic arm routine. */
16185 return elf32_arm_modify_segment_map (abfd
, info
);
16188 /* Return address for Ith PLT stub in section PLT, for relocation REL
16189 or (bfd_vma) -1 if it should not be included. */
16192 elf32_arm_symbian_plt_sym_val (bfd_vma i
, const asection
*plt
,
16193 const arelent
*rel ATTRIBUTE_UNUSED
)
16195 return plt
->vma
+ 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
) * i
;
16200 #define elf32_bed elf32_arm_symbian_bed
16202 /* The dynamic sections are not allocated on SymbianOS; the postlinker
16203 will process them and then discard them. */
16204 #undef ELF_DYNAMIC_SEC_FLAGS
16205 #define ELF_DYNAMIC_SEC_FLAGS \
16206 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
16208 #undef elf_backend_emit_relocs
16210 #undef bfd_elf32_bfd_link_hash_table_create
16211 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
16212 #undef elf_backend_special_sections
16213 #define elf_backend_special_sections elf32_arm_symbian_special_sections
16214 #undef elf_backend_begin_write_processing
16215 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
16216 #undef elf_backend_final_write_processing
16217 #define elf_backend_final_write_processing elf32_arm_final_write_processing
16219 #undef elf_backend_modify_segment_map
16220 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
16222 /* There is no .got section for BPABI objects, and hence no header. */
16223 #undef elf_backend_got_header_size
16224 #define elf_backend_got_header_size 0
16226 /* Similarly, there is no .got.plt section. */
16227 #undef elf_backend_want_got_plt
16228 #define elf_backend_want_got_plt 0
16230 #undef elf_backend_plt_sym_val
16231 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
16233 #undef elf_backend_may_use_rel_p
16234 #define elf_backend_may_use_rel_p 1
16235 #undef elf_backend_may_use_rela_p
16236 #define elf_backend_may_use_rela_p 0
16237 #undef elf_backend_default_use_rela_p
16238 #define elf_backend_default_use_rela_p 0
16239 #undef elf_backend_want_plt_sym
16240 #define elf_backend_want_plt_sym 0
16241 #undef ELF_MAXPAGESIZE
16242 #define ELF_MAXPAGESIZE 0x8000
16244 #include "elf32-target.h"